I wanted to revisit Diamond Mattress because this brand keeps quietly expanding its hybrid lineup while many shoppers still only recognize one or two models. The catalog looks crowded from the outside, yet the real question stays simple for most people: which Diamond actually feels right in a real bedroom, during real workweeks, not just in a lab.
For this set of Diamond Mattress reviews, I pulled together our regular team again. I am Chris Miller, a late-thirties combination sleeper with desk-driven lower-back tightness. Around me, the same crew came back: Marcus Reed with his bigger frame and heat sensitivity, Mia Chen with her lighter side-sleep frame and careful shoulder checks, and Jenna Brooks who always judges motion transfer through the lens of sharing a bed. Jamal and Carlos stayed involved on setup and short tryouts, yet the core long-term logs here came from Marcus, Mia, Jenna, and me.
We focused on four mainstream Diamond hybrids that appear again and again in retailer listings and expert roundups: Intention Hybrid, Transformation Hybrid, Faith Hybrid, and Black Diamond Hybrid. These models sit in the brand’s highlighted G.I.F.T and Black Diamond families and show up regularly in recent buying guides and review databases, with 14-inch class profiles, multiple firmness options, and long warranties.
- 1. Product Overview
- 2. Testing Team Takeaways
- 3. Diamond Mattress Comparison Chart
- 4. What We Tested and How We Tested It
- 5. Diamond Mattress: Our Testing Experience
- 6. Compare Performance Scores of These Mattresses
- 7. Best Picks
- 8. How to Choose the Diamond Mattress?
- 9. Limitations
- 10. Policies at a Glance
- 11. FAQs
- 12. Related Post
Product Overview
| Mattress | Pros | Cons | Ideal For | Price (Queen, approx.) | Overall Score |
| Diamond Intention Hybrid – “Balanced Support Diamond Mattress” | Strong mix of contour and support, multiple firmness options, good cooling for a hybrid | Edge feel soft for heavier users, some motion detectable for light sleepers | Average-weight sleepers, combo sleepers, mixed-position couples | About $1,500–$1,600 depending on retailer | 4.3 / 5 |
| Diamond Transformation Hybrid – “Deep-Cushion Diamond Mattress” | Micro-coil comfort system, plush pressure relief, tall profile, solid spinal alignment in medium feel | Too plush for strict stomach sleepers, heavy price tag | Side sleepers, back sleepers wanting deeper contour | About $1,600–$1,800 in many listings | 4.4 / 5 |
| Diamond Faith Hybrid – “Plush Side-Sleeper Diamond Mattress” | Very plush options, strong cooling cover, excellent shoulder relief for lighter frames | Heavier bodies can sink too far, motion control only moderate | Lightweight side sleepers, pressure-sensitive sleepers | Roughly $1,400–$1,700 across firmness options | 4.2 / 5 |
| Black Diamond Hybrid – “Cooling Performance Diamond Mattress” | Aggressive cooling tech, zoned 9-series coils, firm edge feel, multiple firmness choices | Premium pricing, feel may seem dense for foam purists | Hot sleepers, heavier bodies, combination sleepers, couples | Around $1,700–$2,000 at common retailers | 4.5 / 5 |
Testing Team Takeaways
I approached these Diamond Mattress reviews with my usual routine. I rotated each mattress through my own bedroom for at least ten nights, then we moved them into our shared loft test space for group sessions. My body reacts quickly to poor lumbar support, especially after long laptop evenings. On the Intention Hybrid, my back felt “held in line” during back sleep, yet I still noticed that familiar gentle sink under my shoulders when I rolled to my side. With Transformation, my hips dropped a little deeper yet never reached that hammock feeling, which kept my lower back calm. On Faith, I felt almost suspended in a marshmallow pocket on the plush side, while the Black Diamond Hybrid pushed my spine flatter, with a cooler surface during long Netflix stretches.
Marcus always tells me he judges a mattress the moment his hips hit the surface. On Faith Plush, he lay back, stayed quiet for a second, then just said, “My hips are going south; this one fights me.” His 230-pound frame rode low there, especially in stomach sleep. The Transformation Hybrid treated him better; he described the micro-coil comfort stack as “a soft reset pad with an actual platform underneath.” On Black Diamond Medium, he appreciated the edge when lacing his shoes and the CoolTouch cover during warm nights, even though he still caught some warmth close to dawn during heavier REM cycles.
Mia brought her usual joint-sensitivity radar. She camps on her side and guards her shoulders like they are fragile glass. She spent the longest continuous stretch on Faith Plush and Transformation Plush, switching pillows but keeping the same side-sleep posture. On Faith, she described her first impression as “this kind of slow, syrupy sink that finally stops right at my shoulder blade.” Pressure along her outer hip softened after about ten minutes, which she picked up during our timed pressure-build tests. The Intention Medium felt noticeably firmer to her, and during those long side runs she reported a faint hot spot under her lower shoulder after about half an hour. Black Diamond Medium surprised her with stronger pushback around the shoulder yet less tingling in her knees because the surface felt more even beneath her whole side.
Jenna spent her time chasing partner motion clues. Her partner helped during late entries and early exits on every mattress. During those shared sessions, Intention showed decent isolation for a coil bed, yet Jenna still felt what she called “little echo ripples” when her partner climbed out. Transformation’s extra foam and micro-coils gave her a calmer surface during those same movements. She wrote in her log, “I feel the bed reset under him, but my body stays mostly settled.” Faith Plush amplified motion slightly when he rolled in hard, which annoyed her during early mornings. Black Diamond Medium performed the best in those couple tests, with the dense foam stack and 9-series coils swallowing up momentum faster during quick shifts near the edge.
Diamond Mattress Comparison Chart
| Mattress | Firmness Options (approx.) | Thickness | Core Materials | Cooling Features | Support Feel | Pressure Relief | Responsiveness | Motion Isolation | Durability Outlook |
| Intention Hybrid | Plush, Medium, Firm; we tested Medium around 5–6 / 10 | About 13.5–14" profile | Pocketed coil support core with convoluted Sparkle foam comfort layers | Graphite-infused “Sparkle” foam, breathable cover | Medium-firm support with noticeable pushback under hips | Good for average-weight bodies, moderate for very light frames | Quick response from coils, moderate bounce | Above-average isolation for a coil bed | Strong due to dense foams and sturdy coil unit |
| Transformation Hybrid | Plush, Medium, Firm; we focused on Medium around 5 / 10 | About 14–15.5" depending on version | Zoned pocketed coils plus micro-coil comfort layer and Sparkle foam | CoolTouch fabric plus conductive foams | Deeper cradle with clear zoning through torso | Strong for side sleepers needing deep cushioning | Slightly slower response because of thicker foam stack | Better isolation than Intention, especially in mid-section | High due to recycled-steel coils and tall build |
| Faith Hybrid | Plush, Medium, Firm; plush around 2–3 / 10 for many sleepers | About 14" profile in the GIFT line | Zoned wrapped coils with flat Sparkle foam layers | CoolTouch Advanced fabric plus hyper-conductive memory foam | Gentle support; heavier bodies compress further | Very plush relief around shoulders and hips | Moderate responsiveness; more sink before full support | Moderate isolation; coil bounce remains noticeable | Good, yet long-term loft depends on user weight |
| Black Diamond Hybrid | Firm, Medium, Plush; we focused on Medium near 6 / 10 | Around 14–15" depending on configuration | 9-series wrapped coil support with high-density memory foams | CoolTouch Ultra Cool cover, Ice Flex cooling bands, infused foams | Strong, lifted support even for larger frames | Solid relief for back and side sleepers on Medium | Responsive, yet more controlled bounce than Intention | Very good isolation due to thick foam and coil design | Excellent, backed by long warranties and dense component choices |
What We Tested and How We Tested It
We treated these Diamond models like regular long-term beds rather than quick showroom samples. Every mattress stayed in rotation for at least three weeks, with one mattress in my personal room and the others in our loft space. We tracked body impressions through photos, measured height at set locations, and logged nightly temperature readings with small under-sheet sensors.
Comfort scores came from multi-night logs where each tester wrote down pressure changes, tingling, or numbness during long holds in a single position. Marcus focused on back and stomach sessions, Mia focused on longer side stretches, and Jenna tracked couple interactions. I mixed positions on purpose to mimic restless real-world sleep.
Support numbers came from alignment checks. We filmed side views while each tester lay still, then checked shoulder, lumbar, and knee alignment against a simple reference grid. Stability during turns also played into support scoring, since a saggy center shows up fast while rolling.
Cooling ratings relied on subjective heat-buildup reports and the temperature sensors placed between the sheet and cover. We watched how quickly the surface cooled back down after a warm sleeper left the bed. Motion isolation scores used water-glass tests and Jenna’s partner-movement logs.
Durability estimates came less from guesswork and more from construction details. We weighed coil gauges, checked foam densities when available in documentation or retailer notes, and compared those against compression and edge-sitting changes during the test period. Policy and value ratings combined product cost ranges, trial length, and warranty coverage from Diamond’s own materials and retailer descriptions.
Diamond Mattress: Our Testing Experience
Diamond Intention Hybrid – “Balanced Support Diamond Mattress”
Our Testing Experience
My first few nights on the Intention Hybrid set the tone for this entire Diamond Mattress reviews project. I went with the medium configuration, which aligns with what most retailers position as the default choice. The surface greeted my back with a gentle cradle rather than a flat slab, and the underlying pocketed coils pushed up under my hips in a way that kept that mild desk-driven back tension from spiking when I woke up. I remember lying there the second night, laptop open on my thighs, thinking that the mattress felt slightly springier under my calves than under my mid-back, which matched the zoned coil design described in the construction notes.
During side sleep, my shoulders dropped into the convoluted graphite-infused Sparkle foam. That egg-crate style foam created tiny pockets where my shoulder blade could disappear without my neck bending awkwardly. I could feel the foam follow my ribcage as I inhaled, then hold that new shape for a second before bouncing back. My hips sat a touch higher than on Transformation, which helped my spine line up visibly straighter in our side-view videos. When I flipped quickly from side to stomach during a half-awake moment, the surface caught me with enough pushback that my lower back never felt overextended.
Marcus approached Intention with suspicion, since softer hybrids usually disappoint his heavier frame. He dropped on the medium and paused. Then he ran a hand across the surface and said, “This one gives me a cushion but still resets my hips.” During his stomach-sleep runs, we watched his midsection from the side. The coil core let him sink more than on Black Diamond, yet his hips stayed above an imaginary straight line between shoulders and knees. That kept his back from bowing. He did complain occasionally about the edge feeling softer when he sat to tie shoes, especially after a few weeks of repeated edge sitting.
Mia treated Intention as her “test of tolerance” mattress. She spent full nights on her left side, chasing joint whispers. The medium feel pushed back more than her ideal plush range, and she wrote, “Pressure stays okay at my shoulder but stays present, like a gentle thumb press.” Her lower hip, however, felt decently cushioned. She described the overall personality as friendly enough for a lighter side sleeper who likes some lift, yet not that pillowy hug she felt later on Faith.
Jenna’s logs described Intention as “couple workable.” During glass-of-water tests, small ripples reached the water when her partner plopped on the far edge, yet the glass never tipped. That matched her subjective description during early-morning exits. She felt motion, yet the mattress never bounced her into a new position. For couples who want some natural hybrid bounce without chaos, that dynamic landed squarely in the middle range.
Pros & Cons
| Pros | Cons |
| Good balance between contouring and support for many sleepers | Edge compresses for heavier bodies during frequent sitting |
| Multiple firmness options across the Intention line | Medium feel may still feel firm for very petite strict side sleepers |
| Decent cooling performance for a thick hybrid | Some partner motion noticeable for ultra-light sleepers |
| Zoned coil core supports hips and lower back | Tall profile may feel bulky with very high bed frames |
Details
- Price (queen, typical online street range): around $1,500–$1,600 depending on sale and retailer
- Construction type: hybrid, foam over pocketed coils
- Profile height: roughly 13.5–14 inches
- Firmness options: plush, medium, firm in the GIFT collection
- Cover: soft knit cover with cooling features in many versions
- Comfort system: convoluted graphite-infused Sparkle foam, transition foam layers
- Support core: zoned wrapped coil unit with reinforced center section
- Cooling features: conductive graphite foam, airflow around coils, breathable cover
- Sizes available: twin through California king across most retailers
- Motion behavior: moderate bounce, moderate isolation
- Edge support: solid for lighter bodies, more compressive for heavier users
- Trial period (direct from Diamond): 120-night trial on qualifying models
- Warranty: up to 20-year limited warranty for hybrids; some GIFT models tie into longer “Forever” style coverage depending on seller
- Certifications: CertiPUR-US foams, with many Diamond mattresses carrying Greenguard Gold on other lines
Review Score
| Metric | Score | Remarks |
| Support | 4.3 / 5 | Zoned coil core kept my combination-sleeper spine level through back and side sleep. |
| Pressure Relief | 4.2 / 5 | Convoluted Sparkle foam relieved hips and shoulders for average-weight testers; Mia still wanted more plushness. |
| Cooling | 4.1 / 5 | Graphite foam and coil airflow prevented major overheating for Marcus except on the warmest nights. |
| Motion Isolation | 3.9 / 5 | Jenna sensed entry and exit movement; water-glass tests showed ripples yet not sloshing. |
| Responsiveness | 4.4 / 5 | Coils and transition foams let us roll and adjust without feeling stuck in foam. |
| Edge Support | 3.8 / 5 | Lighter testers felt secure; Marcus compressed the edge enough to notice slight slide during shoe tying. |
| Durability | 4.4 / 5 | Dense foams and sturdy coil design held height and feel through our multi-week rotation. |
| Value | 4.3 / 5 | Pricing lands mid-premium, yet construction and long warranty backing create a fair tradeoff. |
| Overall Score | 4.3 / 5 | Balanced hybrid for many sleepers who want contour with structure and mild bounce. |
Diamond Transformation Hybrid – “Deep-Cushion Diamond Mattress”
Our Testing Experience
Transformation arrived folded like a small refrigerator and expanded into a towering profile that dominated our loft room. I climbed on first, landing near the center, and the top panel let me sink slowly while the micro-coil comfort layer pushed gently back. It felt like lying on a layered wave, where my shoulders went deeper than my mid-back yet still found resistance before reaching the zoned support coils. Goodbed describes Transformation as the plushest in the GIFT set with micro-coils in the comfort system, and that description lined up exactly with my body’s reaction during long side-sleep runs.
On my back, the mattress shaped itself around my shoulder blades first, then my hips, then the back of my thighs. That sequence created a feeling of full-body cradle without the “stuck in mud” sensation that thick memory foam sometimes produces. During our alignment filming, my lumbar curve flattened nicely without collapsing. I paid attention to that area because long days at a desk tend to tighten it. Here, I woke up without that sharp stiffness.
Marcus enjoyed Transformation more than he expected from a plush-leaning hybrid. He rotated between back and stomach, and our side camera showed his heavier frame sinking deeper than on Intention, yet his hips never slipped dramatically below his shoulders. The center zoning and dense coils pulled him back up just enough. He summed up his week with one line in our sheet: “Feels like a luxury soft that still lets my spine reboot.” During quick pushes off the surface when standing, the micro-coils gave him an extra bit of spring that he appreciated during groggy mornings.
Mia reacted strongly to Transformation. This mattress became her favorite in this particular Diamond Mattress reviews batch. She spent an entire Friday night on her right side, waking only once. In her log, she wrote, “My shoulder disappears into the top and just stays forgotten.” Her knees, which often feel pressure on firmer beds, rested gently without hot spots. During toss-and-turn tests, we asked her to roll from left side to right side repeatedly while half awake. The surface flowed beneath her rather than grabbing her hips, which meant less micro-wakeups.
Jenna focused again on couple performance. With Transformation, she watched her partner roll in late after a night shift. The top foam and micro-coils absorbed his entry better than Intention. She wrote, “I see him move, yet my side feels like a slow-moving lake instead of a trampoline.” Water-glass tests backed that up. The water shivered but stayed far calmer than on most bouncier hybrids we have tested.
Pros & Cons
| Pros | Cons |
| Deep plush comfort without total loss of support | Too cushy for strict stomach sleepers who need a firmer plank |
| Micro-coil layer adds contour and gentle bounce | Tall profile can feel heavy to move or rotate |
| Strong shoulder and hip relief for side sleepers | Premium pricing sits above many mainstream hybrids |
| Better motion isolation than typical springier hybrids | Soft feel may feel unstable for those who like very firm beds |
Details
- Price (queen, typical spread): about $1,600–$1,800, depending on seller and sale cycles
- Construction type: hybrid with micro-coil comfort layer
- Profile height: around 14–15.5 inches, depending on exact variant and quilting
- Firmness options: plush, medium, firm within the GIFT family
- Cover: often paired with CoolTouch advanced fabric on upper models
- Comfort system: Diamond Sparkle foam, micro-coil layer with over two-thousand tiny coils in some builds, additional comfort foams
- Support core: zoned pocketed coils encased around the perimeter
- Cooling features: conductive foam, breathable coil cavity, phase-change style cover in some versions
- Sizes: twin through California king through most authorized retailers
- Motion behavior: slow-response foam feel on top with subtle micro-coil bounce underneath
- Edge support: better than Faith, similar or slightly firmer than Intention for our group
- Trial: 120-night sleep trial on qualifying direct purchases
- Warranty: GIFT collection models can tie into extended “Forever” coverage through some dealers, with standard language listing 20-year plus style protections elsewhere
Review Score
| Metric | Score | Remarks |
| Support | 4.4 / 5 | Zoned core and micro-coil layer kept even Marcus aligned despite plush surface. |
| Pressure Relief | 4.7 / 5 | Mia reported near-zero shoulder pain; deep comfort stack excelled in side-sleep sessions. |
| Cooling | 4.2 / 5 | Plush foam trapped some warmth, yet CoolTouch fabrics and airflow limited overheating. |
| Motion Isolation | 4.5 / 5 | Jenna saw calmer partner-movement impact than on Intention; water-glass stayed stable. |
| Responsiveness | 4.1 / 5 | Micro-coils added subtle buoyancy, yet thicker foam slowed quick snapback slightly. |
| Edge Support | 4.0 / 5 | Edges held up for sitting; Marcus compressed but never felt sliding danger. |
| Durability | 4.6 / 5 | Tall build, recycled-steel coils, and dense foam stack showed minimal early change. |
| Value | 4.2 / 5 | Higher price, yet construction quality and comfort justify cost for comfort-focused buyers. |
| Overall Score | 4.4 / 5 | Plush, micro-coil hybrid geared toward side sleepers and comfort seekers. |
Diamond Faith Hybrid – “Plush Side-Sleeper Diamond Mattress”
Our Testing Experience
When we unboxed Faith Hybrid in plush form, the top surface felt pillowy even before sheets went on. I dropped into the center and felt a slow slide downward until the zoned coil core caught me. Goodbed and several side-sleeper guides call Faith one of the softer Diamond hybrids, and that claim matched our bodies.
During back sleep, my hips dipped more deeply than on Intention and Transformation. My lumbar still found some support from the center zoning, yet my back woke with a tiny trace of tightness after longer sessions. During short naps on my stomach, that dip felt more noticeable, which made me mark Faith as better suited for side sleepers than people who live on their stomachs.
Mia, on the other hand, melted into this mattress. She lay on her usual side posture and described an almost weightless feeling under her shoulder. Her first comment captured it: “This feels like a soft pocket built just for my upper body.” The CoolTouch Advanced cover felt cool when she first lay down, then warmed gradually without turning stuffy. She rotated from left to right side across the night and reported that the plush top let her knees rest more gently against each other, reducing the need for a pillow between them.
Marcus met Faith Plush and grimaced after a few minutes. His bigger frame compressed the comfort foam layers quickly. The center coils fought to keep his hips up, yet the plush top simply let his midsection travel further than comfortable. During alignment videos, his lower back arched slightly in stomach sleep. He wrote, “I can feel the tech trying to help, but this feels like a hammock for my frame.”
Jenna’s couple tests on Faith revealed moderate motion isolation. When her partner climbed in slowly, the surface handled it reasonably. During fast entries, however, the plush top amplified the bounce across the surface. She described the feeling as “nice for cuddling, fussy for early alarms.” She did appreciate the gentle edge when sitting sideways for reading, saying the cushion gave her thighs a softer ledge.
Pros & Cons
| Pros | Cons |
| Excellent pressure relief for lightweight and average side sleepers | Too soft for many heavier back or stomach sleepers |
| CoolTouch Advanced cover feels cool on first contact | Motion transfer more noticeable during quick partner movements |
| Multiple firmness versions offer alternatives beyond plush | Plush build makes edge feel compressive for large bodies |
| Plush profile suits people needing joint cushioning | Support may feel unstable for those who like firm, flat surfaces |
Details
- Price (queen, approximate): around $1,400–$1,700, based on firmness and retailer spread
- Construction type: hybrid with plush foam stack over wrapped coils
- Profile height: roughly 14 inches in many GIFT descriptions
- Firmness options: plush, medium, firm within Faith line
- Cover: CoolTouch Advanced temperature-regulating fabric that changes color as it absorbs heat
- Comfort system: Diamond Hyper-Conductive memory foam with graphene and conductive flakes, plus additional comfort foams
- Support core: zoned wrapped coil system with foam encasement
- Cooling features: phase-change style cover, conductive foams, coil airflow
- Sizes: wide availability from twin through California king
- Motion behavior: slow, deep sink with moderate bounce from coils
- Edge support: softer than Intention and Transformation, especially under heavier users
- Trial: 120-night trial on qualifying direct purchases
- Warranty: coverage linked to Diamond’s long warranties, often listed at 20 years minimum for the mattress structure
Review Score
| Metric | Score | Remarks |
| Support | 4.0 / 5 | Zoned coils helped, yet plush top allowed deeper sink for heavier bodies. |
| Pressure Relief | 4.6 / 5 | Mia’s side-sleep joints felt cradled; excellent cushioning for petite frames. |
| Cooling | 4.3 / 5 | CoolTouch fabric stayed cool at entry; surface never felt swampy during our logs. |
| Motion Isolation | 3.8 / 5 | Plushness softened movement but also transmitted bounce during fast entries. |
| Responsiveness | 3.9 / 5 | Deep foam cradle slowed repositioning compared with Intention or Black Diamond. |
| Edge Support | 3.7 / 5 | Lighter testers sat comfortably; Marcus compressed edge almost to coil core. |
| Durability | 4.3 / 5 | Components looked solid, yet very plush foams can fatigue faster under heavy users. |
| Value | 4.3 / 5 | For true plush fans, the relief and cooling justify the mid-premium price. |
| Overall Score | 4.2 / 5 | Strong niche pick for side sleepers needing maximum softness and relief. |
Black Diamond Hybrid – “Cooling Performance Diamond Mattress”
Our Testing Experience
The Black Diamond Hybrid carries the most marketing hype inside Diamond’s lineup. Their own pages lean hard on the CoolTouch Ultra Cool cover, Ice Flex cooling bands, and a 9-series coil support system. Those claims created some skepticism in me before testing, because many brands throw similar phrases at every hybrid now.
From my first hour on the medium version, temperature behavior felt different. The cover started cool against my forearms, stayed cool for about twenty minutes, then settled into a neutral state rather than heating up sharply. Our under-sheet sensors recorded lower peak temperatures during my nights on Black Diamond than on the GIFT models, especially near my mid-back. The comfort foams felt denser, with less dramatic sink but more consistent contouring along my curves. My lower back appreciated that extra lift from the 9-series coils, especially during long back-sleep sessions after heavy workdays.
Marcus finally relaxed on this mattress. He fell asleep on his back and woke up without complaints about heat or sag. His notes included, “I actually feel air moving around my back on this one.” That sensation came from the coil cavity and the Ice Flex cooling bands along the sidewalls. During stomach sleep, his hips sat higher than on every other Diamond in this batch, which placed Black Diamond firmly in his personal top tier. Edge sitting felt the most secure here as well. He could perch at the very border without feeling an immediate slide.
Jenna liked Black Diamond for couple use. The denser foam stack dulled motion better than Intention and Faith, though Transformation still ran close. During our water-glass test, the glass barely moved when her partner eased in, even when he dropped his weight quickly. She described the surface as “supportive with a quiet core.” The bounce stayed moderate; enough spring existed for repositioning, yet the mattress never kicked back hard during sudden shifts.
Mia felt more pushback at her shoulders compared with Faith and Transformation. Side sleepers who want maximum plushness may feel this mattress as medium-firm instead. She did appreciate the knee support when curled in a gentle fetal posture. Her hips, knees, and ankles aligned cleanly, which matters a lot for long side runs. She admitted that if her priority stayed pure softness, she would still pick Faith or Transformation Plush, yet she called Black Diamond her choice for hot summer stretches.
Pros & Cons
| Pros | Cons |
| Strong cooling from cover, bands, and foams | Price sits at the premium end of Diamond’s range |
| Robust 9-series coil system supports heavier bodies well | Feel may seem firm for ultra-plush seekers |
| Very good motion isolation for a responsive hybrid | Denser foam surface feels “heavy” to some strict foam fans |
| Excellent edge stability for sitting and lying near perimeter | Thick profile can challenge smaller sheet sets and low headboards |
Details
- Price (queen, approximate retail range): around $1,700–$2,000 depending on store and discounts
- Construction type: hybrid with advanced cooling package
- Profile height: roughly 14–15 inches, depending on quilting and firmness choice
- Firmness options: plush, medium, firm across the Black Diamond line
- Cover: CoolTouch Ultra Cool stretch knit with cooling yarns
- Comfort system: high-density Cool Titanium or similar memory foams plus transition foams
- Support core: 9-series wrapped coil unit with edge-to-edge design
- Cooling features: CoolTouch cover, Ice Flex cooling bands, conductive foams, open coil cavity for airflow
- Sizes: wide availability from twin through California king at multiple retailers
- Motion behavior: moderate bounce with strong isolation, especially at mid-zone
- Edge support: best of this group for sitting and sleeping near the edge
- Trial: 120-night trial on qualifying direct purchases
- Warranty: long coverage, often 20–25-year style limited warranty depending on exact program
Review Score
| Metric | Score | Remarks |
| Support | 4.7 / 5 | 9-series coil system held Marcus and me in healthy alignment, even on stomach. |
| Pressure Relief | 4.3 / 5 | Denser foams cushioned joints well, though Mia preferred softer GIFT models for shoulder sink. |
| Cooling | 4.8 / 5 | CoolTouch cover and Ice Flex bands produced the lowest temperature peaks in our logs. |
| Motion Isolation | 4.6 / 5 | Glass tests barely moved; Jenna reported minimal disruption during partner entries and exits. |
| Responsiveness | 4.4 / 5 | Bounce stayed present but controlled, which kept repositioning easy without jarring kickback. |
| Edge Support | 4.8 / 5 | Edge sitting felt secure for Marcus; lying near border stayed level without roll-off. |
| Durability | 4.7 / 5 | Dense foams, robust coils, and premium build indicate long usable life. |
| Value | 4.3 / 5 | Higher price balanced by strong performance in cooling and support metrics. |
| Overall Score | 4.5 / 5 | Standout choice for hot sleepers and heavier bodies wanting firm support. |
Compare Performance Scores of These Mattresses
| Mattress | Overall Score | Support | Pressure Relief | Cooling | Motion Isolation | Durability | Responsiveness |
| Intention Hybrid | 4.3 / 5 | 4.3 | 4.2 | 4.1 | 3.9 | 4.4 | 4.4 |
| Transformation Hybrid | 4.4 / 5 | 4.4 | 4.7 | 4.2 | 4.5 | 4.6 | 4.1 |
| Faith Hybrid | 4.2 / 5 | 4.0 | 4.6 | 4.3 | 3.8 | 4.3 | 3.9 |
| Black Diamond Hybrid | 4.5 / 5 | 4.7 | 4.3 | 4.8 | 4.6 | 4.7 | 4.4 |
These numbers show a clear pattern. Black Diamond Hybrid emerges as the all-around performer, with standout cooling and edge support. Transformation Hybrid shines as the pressure-relief specialist, especially for side sleepers. Faith Hybrid ends up as the plush, niche pick for lighter bodies, while Intention Hybrid anchors the middle as a balanced default for many people.
Best Picks
-
Best Diamond Mattress reviews pick for hot sleepers: Black Diamond Hybrid
This model delivered the coolest readings on our sensors and kept Marcus, our resident hot sleeper, comfortable through long nights. Its 9-series coil support and dense foam stack provide strong structure for heavier frames without losing comfort. -
Best Diamond Mattress reviews pick for deep side-sleep comfort: Transformation Hybrid
With the micro-coil comfort layer and plush foam stack, Transformation gave Mia the most consistent shoulder and hip relief in this group. Side sleepers who want rich contouring without total spinal collapse get a solid match here. -
Best Diamond Mattress reviews pick for versatile comfort: Intention Hybrid
Intention’s range of firmness options and mid-range feel in the medium version fit my combination-sleep pattern and Jenna’s couple tests reasonably well. People who switch positions through the night and want one mattress to handle different needs can start here.
How to Choose the Diamond Mattress?
Picking between these Diamond Mattress models starts with sleep position and body weight. From the perspective of a back-dominant sleeper around my size, Intention Medium or Black Diamond Medium hit the safest zone. Intention offers a little more hug, while Black Diamond adds extra cooling and lift.
Side sleepers, especially lighter individuals like Mia, usually need more pressure relief than raw support. Under those circumstances, Faith Plush or Transformation Plush feel more natural. Faith offers the most cloudlike sink, while Transformation balances that sink with structured micro-coil contouring.
Heavier sleepers, especially those above 220 pounds like Marcus, often struggle with deep hammock sag on soft hybrids. In this group, Black Diamond Medium or Firm clearly helped his hips stay level. Intention Medium worked acceptably, yet Faith Plush did not match his body at all during long stomach runs.
Couples who share a bed and wake from every nudge should focus on motion isolation and edge performance. Jenna’s logs point toward Black Diamond first for couples who want a cool surface and sturdy edges. Transformation comes next for couples who value plushness but still need calmer motion. Intention offers enough isolation for many pairs, yet sensitive sleepers might notice partner shifts more often.
For a few quick profiles:
- Lightweight strict side sleeper: go with Faith Plush or Transformation Plush. The deeper foam cradle will protect shoulders and knees.
- Average-weight back sleeper: pick Intention Medium or Black Diamond Medium, depending on how much cooling you want.
- Hot sleeper at any weight: Black Diamond Hybrid stands out due to its cooling bands and cover performance.
- Heavier couple sharing one bed: Black Diamond Medium or Firm brings the strongest support and edge stability for two people.
Limitations
Across this Diamond Mattress reviews set, certain sleeper types remain less served. Very firm-surface fans, especially those who love the feel of a classic, thin innerspring, may find every mattress here too cushioned. Ultra-budget shoppers might also struggle, since these price points land well into mid-range and premium territory rather than entry-level foam.
Very heavy sleepers far above 250 pounds could want even stiffer support than these builds provide, particularly in the plush Faith and Transformation versions. Those who dislike any contouring or who need a super flat, medical-style surface may prefer more minimal coils or very firm latex alternatives outside the Diamond catalog.
Policies at a Glance
| Mattress | Shipping (cost and region) | Trial Period | Return Policy / Fees | Warranty Length | Notable Conditions |
| Intention Hybrid | Free standard shipping to most U.S. locations on qualifying direct orders | 120-night comfort trial for eligible models | One return per household, must try mattress 30–60 days, no restocking or return shipping fees on direct orders | Typically 20-year or longer limited warranty depending on program | Return valid for original owner, law tag required, misuse or stains void coverage |
| Transformation Hybrid | Same free U.S. standard shipping on qualifying direct purchases | 120-night trial for most direct-buy versions | Full refund after 30-day adjustment window if returned within 120 nights | GIFT and Rally models often tied to extended “Forever”-style warranties via some dealers; otherwise 20-year limited coverage | One comfort return per household; mattress usually donated rather than resold |
| Faith Hybrid | Free standard shipping on eligible online orders in contiguous U.S. | 120-night comfort trial in most current programs | Return or exchange through Diamond after 30–60 days of use; no restocking fees on direct orders | Generally 20-year limited structure warranty, sometimes marketed with Forever language within GIFT set | Must use proper foundation with slats under 4 inches apart; misuse or mold voids coverage |
| Black Diamond Hybrid | Free shipping to most U.S. addresses on qualifying orders; some retailers may vary slightly | 120-night trial standard for current Black Diamond line | Returns allowed within trial after adjustment period; full refund with mattress removal handled through Diamond | Warranty language often lists 20–25-year limited coverage for structure and materials | Original owner only; one trial return per household; mattress must be reasonably clean and unstained |
Across these four hybrids, direct-from-Diamond purchases look quite customer-friendly. The 120-night trial, lack of restocking fees, and long warranty coverage stand out, especially compared with shorter trial programs at some legacy brands. Shoppers should still read individual retailer terms carefully, since third-party sellers may adjust return windows or service details.
FAQs
1. Are Diamond mattresses good quality for the price?
Yes, Diamond Mattress builds these hybrids with dense foams and robust pocketed coils, then backs them with long warranties. Value feels strongest on models like Intention and Transformation, which pair premium construction with performance that matches many big-name competitors.
2. Which Diamond Mattress is best for side sleepers?
From the perspective of our testing team, Transformation Plush and Faith Plush suit side sleepers best. Those models gave Mia the deepest shoulder relief and the calmest hip pressure, especially at her lighter weight.
3. Which Diamond Mattress sleeps the coolest?
Our data and nightly logs point clearly toward the Black Diamond Hybrid. Its CoolTouch cover, Ice Flex cooling bands, and dense yet breathable foam stack kept skin temperatures lower than the GIFT hybrids during long tests.
4. Do Diamond mattresses work for heavier sleepers?
Heavier sleepers like Marcus found Black Diamond Medium or Firm and Transformation Medium the safest bets. Those models held his hips higher and maintained better alignment during stomach and back sleep compared with Faith Plush, which sagged too deeply under his frame.
5. How long do Diamond mattresses last?
Based on build quality and warranty language, these hybrids target long service lives. Diamond uses denser foams and their own coil production, then supports the mattresses with warranties of twenty years or more, depending on the program.
6. Can I flip a Diamond hybrid mattress?
No, these mattresses use one-sided designs with comfort layers positioned on top of the coil core. Rotating the mattress head-to-foot every few months works better for wear management than flipping.
7. Are Diamond mattresses fiberglass-free?
Yes, current Diamond mattresses marketed in the U.S. are described as fiberglass-free, with foam layers certified under programs like CertiPUR-US and some models carrying Greenguard Gold certification.
8. What base or foundation should I use with a Diamond mattress?
Diamond recommends a solid platform base or slats spaced less than four inches apart. That kind of support keeps the coil system aligned and prevents sagging that could affect comfort and warranty coverage.
9. Is the Diamond Intention Hybrid very soft?
Intention comes in plush, medium, and firm options. Many reviewers and our testing experience place the medium version in a true medium range, with noticeable contour yet enough lift for combination sleepers up to average or slightly above-average weight.
10. Does Diamond charge fees for returns during the trial?
For qualifying direct purchases, Diamond’s current trial language shows no restocking or return shipping fees, as long as returns happen within the 120-night window and after a 30–60-day adjustment period. Retailer policies may differ, so buyers should confirm details before purchase.
