Diamond Mattress has been quietly expanding its hybrid lineup, and the names can blur together fast. In this review, we focus on how the beds feel after real nights at home—not a quick showroom lay-down.
For these Diamond Mattress reviews, our regular test group returned. I’m Chris Miller, a combination sleeper who notices lower-back strain when a mattress lets my hips dip. Marcus Reed (larger build, runs hot), Mia Chen (lighter side sleeper, shoulder-sensitive), and Jenna Brooks (shares a bed and tracks motion) handled most of the nightly logs, with Jamal and Carlos helping with setup and short trials.
We focused on four Diamond hybrids that come up repeatedly in retailer listings: Intention Hybrid, Transformation Hybrid, Faith Hybrid, and Black Diamond Hybrid. They’re all thick, hybrid-style builds with multiple firmness options, but the feel and “best fit” can be very different.
Product Overview
| Mattress | Pros | Cons | Ideal For | Price (Queen, approx.) | Overall Score |
|---|---|---|---|---|---|
| Diamond Intention Hybrid | Balanced mix of contour and support; multiple firmness options; stays reasonably cool for a thick hybrid | Edge feels softer for heavier sitters; light sleepers may still notice partner movement | Average-weight sleepers, combo sleepers, mixed-position couples | About $1,500–$1,600 (queen, varies by retailer) | 4.3 / 5 |
| Diamond Transformation Hybrid | Deep cushioning with a micro-coil feel; excellent pressure relief; strong alignment in medium | Too plush for strict stomach sleepers; typically priced at the premium end | Side sleepers, back sleepers wanting deeper contour | About $1,600–$1,800 (queen, varies by retailer) | 4.4 / 5 |
| Diamond Faith Hybrid | Plush options with easy shoulder relief; cool-to-the-touch cover feel on entry | Heavier bodies can sink too deeply on plush; motion control is only mid-pack | Lightweight side sleepers, pressure-sensitive sleepers | About $1,400–$1,700 (queen, varies by version) | 4.2 / 5 |
| Black Diamond Hybrid | Strong cooling package; very stable edge; supportive feel that suits larger frames | Premium pricing; denser surface feel than the softer GIFT models | Hot sleepers, heavier bodies, combination sleepers, couples | About $1,700–$2,000 (queen, varies by retailer) | 4.5 / 5 |
Testing Team Takeaways
We started with real at-home rotation. Each mattress spent about ten nights in my bedroom before moving into our loft test space for group sessions. Across the full rotation, we logged roughly three weeks of notes per model—support, pressure relief, heat buildup, and motion transfer—so the takeaways reflect regular workweek sleep, not a single afternoon.
What We Tested and How We Tested It
We treated these Diamond hybrids like real beds, not quick showroom samples. One mattress stayed in my room while the others rotated through our loft space, and each model logged about three weeks of use across the team. We photographed impressions, measured height in a few fixed spots, and tracked temperature shifts with thin sensors under the sheet.
Comfort scores came from multi-night logs. Each tester noted changes, tingling, or numbness during long holds in one position. Marcus ran extended and sessions, Mia did longer side stretches, and Jenna focused on shared-bed disruption. I mixed positions on purpose to mirror restless, real-world sleep.
Support scores came from alignment checks. We filmed side views, then looked for shoulder-to-hip-to-knee alignment, especially in positions where sag shows up quickly. We also rated how stable the bed felt during turns, since a soft center often reveals itself when you roll.
Cooling ratings combined subjective heat-build reports with the sensor readings. We watched how quickly the surface returned to neutral after a warm sleeper got up. scores used water-glass tests and Jenna’s partner-movement logs.
Durability estimates came from construction clues and short-term change. We tracked edge sit-down compression, checked for early body impressions, and compared what we observed against typical hybrid wear patterns. Value ratings balanced the usual price range with trial and warranty terms where they were clearly stated by the seller.
Diamond Mattress: Our Testing Experience
Diamond Intention Hybrid
Our Testing Experience
I tested the Intention Hybrid in medium, the configuration most listings treat as the default. The surface has a light cradle, but the coil system pushes back under the hips, so my lower back felt supported instead of “dropping” after long desk days.
On my side, the convoluted graphite-infused foam created small pockets for my shoulder blade, which helped reduce pinch without forcing my neck into an awkward angle. It also rebounded quickly, so I could roll without feeling stuck in the comfort layers.
Across the group, Intention landed as the balanced option. Marcus appreciated the lift but noticed the edge compress more during frequent sitting. Mia felt the medium comfort as a touch firm through the shoulder on long side holds. Jenna’s couple tests showed moderate motion transfer—noticeable, but not disruptive for most pairs.
Pros & Cons
| Pros | Cons |
|---|---|
| Balanced contour and support for many sleepers | Edge compresses more for heavier sitters |
| Firmness options make it easier to fine-tune feel | Medium can feel firm for very petite side sleepers |
| Reasonably cool for a thick hybrid | Partner movement is noticeable for ultra-light sleepers |
| Zoned support helps keep hips from sinking | Tall profile may need deep-pocket sheets |
Details
- Price (queen, typical range): around $1,500–$1,600 depending on retailer and sales
- Construction type: hybrid (foam over pocketed coils)
- Profile height: roughly 13.5–14 inches
- Firmness options: plush, medium, and firm
- Comfort system: convoluted graphite-infused Sparkle foam plus transition foams
- Trial period: 120-night trial is commonly listed on eligible direct programs (check your seller)
- Warranty: often listed at 20 years or longer depending on program
Diamond Transformation Hybrid
Our Testing Experience
Transformation is the most “cushioned” feel in this group. The top lets you sink gradually, then the micro-coil layer adds a gentle pushback before you reach the support coils. On my side, my shoulders settled deeper than my mid-back, but I still felt resistance instead of a bottomless drop.
On my back, the bed spread pressure across my shoulder blades and hips in a way that reduced next-morning stiffness. In our alignment checks, my lumbar curve flattened without collapsing, which is exactly what I want after long desk days.
Across the team, Transformation was the pressure-relief standout. Marcus sank deeper than on Intention but still stayed aligned in back and stomach sleep. Mia logged her best shoulder comfort here and said the bed “gave” without grabbing when she rolled. Jenna also rated it calmer for partner motion than Intention, with less bounce during late-night entry and early-morning exits.
Pros & Cons
| Pros | Cons |
|---|---|
| Deep cushioning with real support underneath | Too plush for strict stomach sleepers |
| Micro-coil layer adds contour and controlled bounce | Tall, heavy profile is harder to move |
| Excellent shoulder and hip relief for side sleepers | Often priced above mainstream hybrids |
| Calmer motion than many bouncy hybrids | Soft feel can seem unstable to firm-bed fans |
Details
- Price (queen, typical range): about $1,600–$1,800 depending on seller and promotions
- Construction type: hybrid with a micro-coil comfort layer
- Profile height: around 14–15.5 inches depending on the exact version
- Firmness options: plush, medium, and firm
- Comfort system: Sparkle foam plus a micro-coil layer (often marketed as 2,000+ micro-coils in some builds)
- Trial period: trial terms vary by retailer; eligible direct programs commonly list 120 nights
- Warranty: commonly listed around 20 years, with variations by program
Diamond Faith Hybrid
Our Testing Experience
Faith Hybrid in plush is the softest feel we tested in this batch. You sink slowly into the top layers until the zoned coils start to push back, which creates a cozy, “pocketed” cradle rather than a flat, firm surface.
For me, that softness was best on my side, where my shoulder and hip pressure eased quickly. On my back, my hips dipped more than on Intention or Transformation, and I noticed mild tightness after longer stretches. On my stomach, the plush feel was simply too forgiving for my preferences.
Mia loved Faith plush for shoulder relief and described it as the easiest bed for her joints. Marcus had the opposite reaction: his frame compressed the plush top too deeply, and alignment looked less stable in stomach sleep. Jenna rated motion isolation as middle-of-the-pack—fine for slow movement, but bouncier during quick turns.
Pros & Cons
| Pros | Cons |
|---|---|
| Excellent pressure relief for lightweight and average side sleepers | Too soft for many heavier back or stomach sleepers |
| Cool-to-the-touch cover feel on entry | More bounce during faster partner movement |
| Multiple firmness versions beyond plush | Edge feels compressive for larger bodies |
| Good choice for people who need joint cushioning | Soft feel can seem unstable to firm-bed fans |
Details
- Price (queen, typical range): around $1,400–$1,700 depending on version and retailer
- Construction type: hybrid (plush foam stack over wrapped coils)
- Profile height: roughly 14 inches in many listings
- Firmness options: plush, medium, and firm
- Comfort system: plush foams designed for deeper contouring and pressure relief
- Trial period: trial terms vary by seller; eligible direct programs often list 120 nights
- Warranty: commonly listed around 20 years, with variations by program
Black Diamond Hybrid
Our Testing Experience
Black Diamond Hybrid is positioned as Diamond’s cooling-forward option, with a CoolTouch cover and Ice Flex cooling bands called out in product descriptions. I went in skeptical—cooling claims are easy to overstate—but this was the one mattress in the group that consistently felt cooler at first contact.
On the medium feel, the cover started cool, then settled to neutral rather than heating up sharply. The comfort foams felt denser than the GIFT models, with less dramatic sink but more consistent contouring along my back. That steadier lift kept my spine flatter on back sleep, especially after long workdays.
Marcus rated Black Diamond as his safest pick for support and edge stability, particularly in stomach and back sleep. Jenna’s couple tests also favored it for motion control—the surface stayed quieter during entry and exits. Mia felt more pushback at the shoulder than on Faith or Transformation, but she preferred it for warmer nights when she wanted less sink and a cooler surface.
Pros & Cons
| Pros | Cons |
|---|---|
| Strong cooling feel from cover and bands | Premium pricing |
| Supportive feel that suits heavier bodies well | May feel too firm for ultra-plush seekers |
| Very good motion isolation for a responsive hybrid | Denser surface feel isn’t for everyone |
| Excellent edge stability for sitting and sleeping near the perimeter | Thick profile may require deep-pocket sheets |
Details
- Price (queen, typical range): around $1,700–$2,000 depending on retailer and discounts
- Construction type: hybrid with a cooling-focused design
- Profile height: roughly 14–15 inches depending on configuration
- Firmness options: plush, medium, and firm
- Cooling features: CoolTouch cover and Ice Flex cooling bands (plus infused foams in many versions)
- Trial period: 120-night trial is listed on Diamond’s direct site for current Black Diamond models
- Warranty: 20-year limited warranty is listed for current Black Diamond models
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 |
The pattern here is straightforward: Black Diamond scored highest for cooling and overall stability, while Transformation led for pressure relief, especially for side sleepers. Faith is the softest, most side-sleeper-friendly option, and Intention is the balanced middle ground for mixed sleep positions.
How to Choose the Diamond Mattress?
Start with sleep position and body weight. For average-weight back and combination sleepers, Intention in medium or Black Diamond in medium are the safest starting points. Intention feels a bit more cushioned; Black Diamond feels firmer and cooler.
Lighter side sleepers usually need deeper pressure relief. Faith plush is the softest option here, while Transformation plush offers similar cushioning with a steadier “understructure.”
Heavier sleepers often need more lift to avoid a hammock feel. In our tests, Black Diamond in medium or firm kept hips highest. Intention medium worked reasonably well, while Faith plush was too soft for long stomach runs.
For couples, prioritize motion isolation and edge stability. Black Diamond was the calmest and most secure at the perimeter. Transformation was close behind for motion control, and Intention is a workable middle ground for many pairs.
Quick matches:
- 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
These four models lean plush-to-medium overall. If you want a very flat, ultra-firm “traditional innerspring” feel, none of them will be a perfect match. Price is also mid-range to premium rather than entry-level.
Very heavy sleepers well above 250 pounds may still want an even firmer build than the soft versions of Faith or Transformation provide. If you dislike contouring altogether, a firmer coil-only or latex-forward design outside this lineup may fit better.
Policies at a Glance
| Mattress | Shipping (cost and region) | Trial Period | Return Policy / Fees | Warranty Length | Notable Conditions |
|---|---|---|---|---|---|
| Intention Hybrid | Varies by retailer; many online sellers offer free or low-cost delivery | Varies by seller; trial programs often run up to 120 nights | Return/exchange rules depend on the retailer’s trial terms | Commonly listed around 20 years (program-dependent) | Confirm required foundation and condition standards before buying |
| Transformation Hybrid | Varies by retailer; delivery method depends on the seller | Varies by seller; trial length and start date differ by retailer | Return terms differ; some sellers require an adjustment period | Commonly listed around 20 years (program-dependent) | Check whether comfort exchanges are offered in your region |
| Faith Hybrid | Varies by retailer; delivery terms depend on the seller | Varies by seller; trial length differs by program | Return/exchange terms vary; verify fees and pickup options | Commonly listed around 20 years (program-dependent) | Use a supportive base to protect comfort and warranty coverage |
| Black Diamond Hybrid | Diamond.com lists shipping to most U.S. addresses (timing varies) | 120-night trial is listed on Diamond’s direct site for current Black Diamond models | Diamond’s direct listing describes free returns/exchanges within the trial window | 20-year limited warranty is listed for current Black Diamond models | Direct terms apply to direct purchases; retailer terms may differ |
Policy details depend on where you buy. Some Diamond models sold directly list a 120-night trial and long warranty coverage, while retailer programs can differ on shipping, trial timing, and pickup logistics. Before checkout, confirm the exact trial window, any adjustment-period rules, and the condition requirements for returns.
FAQs
1. Are Diamond mattresses good quality for the price?
In this group, the builds felt solid for the price tier: thick comfort layers over wrapped coils, with a noticeable step-up in edge stability and cooling on Black Diamond. Value will depend heavily on the deal you find and the specific version you buy.
2. Which Diamond Mattress is best for side sleepers?
If you want deeper cushioning, Transformation and Faith (especially in plush) were the most shoulder-friendly in our side-sleep sessions. If you prefer less sink, Intention or Black Diamond in medium can still work for side sleepers who like a steadier surface.
3. Which Diamond Mattress sleeps the coolest?
Based on our nightly logs, Black Diamond felt the coolest at first contact and stayed the most temperature-neutral through the night compared with the other models we tested.
4. Do Diamond mattresses work for heavier sleepers?
For larger frames, Black Diamond in medium or firm provided the most consistent lift and the most stable edge in our tests. Transformation in medium also held alignment well, while Faith in plush was generally too soft for heavier stomach sleepers.
5. How long do Diamond mattresses last?
Lifespan depends on the exact materials, your body weight, and how well the bed is supported. These hybrids are positioned as long-term mattresses, and many programs list multi-decade limited warranties, but real-world durability still varies by use.
6. Can I flip a Diamond hybrid mattress?
Most hybrid builds are designed to be used one-sided. Rotating the mattress head-to-foot periodically is usually the better maintenance move than flipping.
7. Are Diamond mattresses fiberglass-free?
Diamond states its mattresses are fiberglass-free and highlights third-party foam certifications on many models. If this is a top priority, confirm the exact model and cover materials with your seller before purchase.
8. What base or foundation should I use with a Diamond mattress?
A solid platform or a supportive slatted base is the safest choice. Many sellers recommend keeping slats close together to prevent sagging and protect warranty coverage.
9. Is the Diamond Intention Hybrid very soft?
Intention is offered in multiple firmness options. The medium feel we tested landed in the true medium range—noticeable contouring, but enough pushback to keep hips from sinking too far for most average-weight combination sleepers.
10. Does Diamond charge fees for returns during the trial?
Fees and logistics depend on where you buy. Diamond’s direct listings describe free returns or exchanges within the stated trial window on eligible models, while third-party retailers may set different rules, pickup options, or timelines.
