Casper’s Cloud One is an 11" all-foam mattress with a medium-soft, responsive feel. In our hands-on testing, it delivered standout pressure relief and very low motion transfer, while edge support and cooling were more average. It’s a strong fit for most side and back sleepers—and for couples who want a quieter surface—but heavier stomach sleepers and people who regularly sleep hot may want something firmer or more actively cooled.
Table of Contents
Product Overview
| Mattress | Overall Score | Pros | Cons | Ideal For |
|---|---|---|---|---|
| Casper Cloud One Mattress | 4.0/5.0 | Cushioned pressure relief, excellent motion isolation, easier movement than many foams | Edge support is just OK, cooling is average | Side/back sleepers, couples who like a softer foam feel |
Final Verdict
Cloud One feels inviting right away—soft on top, but not so sinky that your hips disappear. In our testing, we liked the calm, steady surface for shared sleep and the way it eased shoulder and hip pressure. The trade-offs are a perimeter that feels less supportive than a strong hybrid edge and cooling that may not be enough for people who regularly overheat.
Who It's For
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Who It's Not For
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Couples who prioritize low motion transfer
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Back sleepers who like a medium-soft feel with steady support
Who It’s Not For
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Heavier stomach sleepers who need a firmer, flatter surface
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Anyone who sits on the edge often and wants a firmer perimeter
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Hot sleepers who tend to overheat at night
How We Tested
We slept on the mattress nightly, rotated sleep positions, and repeated the same checks across multiple weeks so early impressions didn’t carry the whole review. Using the same routines we apply to all beds, we scored Support, Cooling, Pressure Relief, Motion Isolation, Responsiveness, Edge Support, and Durability—checking alignment by position, how quickly the surface warmed after lights-out, pressure hot spots, partner-movement drills, edge sit/sleep trials, and foam recovery after repeated compression.
Our Testing Experience
On night one, the surface gave that “soft landing,” but it still pushed back when we rolled from side to back. Sitting up to read didn’t feel like our hips were sliding into a dip. Carlos (5'11", 175 lbs) noticed the transition into the deeper support felt smooth rather than abrupt, which helped his mid-back stay calmer when lying flat. Mia (5'4", 125 lbs) called out the shoulder comfort—she could settle onto her side without the sharp joint pressure she gets on firmer foams. Marcus (6'1", 230 lbs) liked the initial plushness, but he flagged two limits early: warmth building after a few hours and edges that were fine for sleeping near, but less supportive when sitting to put on shoes.
What we liked
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Immediate pressure relief at the shoulders and outer hips
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A quiet surface that stayed stable when a partner moved
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Soft comfort that still kept our lower backs from feeling over-arched
Who it is best for
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Lightweight-to-average side sleepers who want a plusher top
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Back sleepers who prefer gentle contouring over a firm, flat feel
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Couples who don’t want to feel every movement in the bed
Where it falls short
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Hot sleepers who need stronger cooling features
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People who want a rigid edge for frequent sitting
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Stomach sleepers who need firmer hip control
Pros & Cons
| Pros | Cons |
|---|---|
| Strong pressure relief for side sleeping | Cooling is only average for hot sleepers |
| Strong motion isolation for couples | Edge support is average for sitting |
| Responsive enough for easy position changes | Not ideal for heavier stomach sleepers who need firmer hip support |
| Soft feel without an immediate “hammock” dip | May feel too soft if you prefer a firmer bed |
Details
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Mattress: Casper Cloud One Mattress (all-foam)
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Feel: Medium-soft
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Height: 11"
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Sizes and dimensions (11" height):
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Twin: 38" x 75"
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Twin XL: 38" x 80"
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Full: 53" x 75"
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Queen: 60" x 80"
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King: 76" x 80"
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California King: 72" x 84"
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Materials (as listed): breathable polyurethane foam on top; memory foam beneath; polyurethane-foam base with patented Core+ design
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Shipping and returns: free shipping and free returns; extra fees may apply to Alaska and Hawaii; returns can be started after a 30-night adjustment period
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Trial: 100-night risk-free trial
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Warranty: 10-year limited warranty
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Delivery timeline noted: UPS Standard Shipping typically takes 2–8 business days
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Cover care: do not remove the cover; spot-clean with water and mild detergent
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Frame guidance: use flat slats no more than 4" apart
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Additional note: fiberglass-free; designed and assembled in the USA
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.1/5 | Soft on top, but steady enough to keep hips from dropping for most sleepers |
| Cooling | 3.7/5 | Breathable foams help, but heat-prone sleepers may still warm up overnight |
| Pressure Relief | 4.4/5 | Shoulder and hip comfort was the clearest strength in our tests |
| Motion Isolation | 4.6/5 | Partner movement stayed muted and localized |
| Responsiveness | 3.9/5 | Easy turns for an all-foam bed, though not springy like a hybrid |
| Edge Support | 3.6/5 | Fine for sleeping near the edge, less solid for frequent sitting |
| Durability | 4.0/5 | Consistent foam recovery in our repeated compression checks |
| Overall | 4.0/5 | A plush-leaning, couple-friendly foam mattress with a few practical trade-offs |
Choosing Cloud One
Start with feel when you choose a mattress: Cloud One lands in the medium-soft range, so it tends to suit side sleepers and anyone who wants a gentler landing. Next, think about body weight and position—average-weight back sleepers usually do well, while heavier stomach sleepers often need a firmer surface to keep hips level. If you sleep hot, plan accordingly: it’s breathable, but not a dedicated cooling mattress. If you want a cooler option, Casper’s Snow line is worth a look. If you want stronger edges and a more lifted feel, a sturdier hybrid like the Saatva Classic can make more sense.
Limitations
Cloud One’s main trade-off is that its plush comfort can feel too forgiving for heavier stomach sleepers or anyone who prefers a firmer, flatter sleep surface. Edge support is also only average, so if you sit on the side daily or tend to sleep right at the perimeter, a sturdier hybrid-style edge may feel more secure.
Cloud One vs Alternatives
Why choose Cloud One
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Alternatives to consider
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Very low motion transfer for calmer partner sleep
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A responsive foam feel that’s easier to reposition on than many slow foams
Alternatives to consider
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Tempur-Pedic TEMPUR-Cloud: deeper, slower contouring for a more classic memory-foam feel
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Saatva Classic: stronger edges and a more lifted, springy surface
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Leesa Original: a more balanced foam feel if you want less plushness
Pro Tips
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Give it a consistent break-in period before judging firmness night to night.
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If you run warm, use breathable sheets and lighter bedding to help the foams vent heat.
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Side sleepers: a slightly higher-loft pillow can keep your neck neutral on the plusher top.
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Back sleepers: a thin knee pillow can reduce low-back tension if you’re sensitive.
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Rotate the mattress periodically to help even out wear patterns.
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Let the mattress fully expand and air out after unboxing before making final comfort calls.
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Keep your frame support tight; wide slat gaps can make foam mattresses feel softer.
FAQs
Does Cloud One feel like “traditional” memory foam?
It has memory-foam contouring, but it doesn’t feel overly sticky. In our position changes, it responded quickly enough that we didn’t feel trapped, especially compared with slower, denser foams.
Is it good for couples?
Yes. Motion stayed localized in our partner-movement checks, so getting in and out of bed caused far less ripple than we see on many hybrids.
Will it work for stomach sleeping?
For occasional stomach time, it can work. For full-time stomach sleepers—especially heavier ones—a firmer mattress is usually better at keeping the hips from sinking and pulling the lower back out of neutral.
