Casper Cloud One Mattress Reviews (2026)

Cloud One is a convincing choice if you want plush foam without the stuck-in-bed feel. It relieved pressure at the shoulders and hips, kept partner movement contained, and supported comfortable position changes. The 4.0/5 overall score reflects a bed with two clear strengths—pressure relief and motion isolation—and two practical compromises: average temperature control and an edge that feels less secure for sitting than a well-built hybrid perimeter.

Best for

• Side sleepers who need more room for the shoulder and hip to settle

• Back sleepers who prefer gentle contouring instead of a firm, flat surface

• Couples who are easily disturbed by movement

Skip it if

• You are a heavier, full-time stomach sleeper who needs stronger hip control

• You sit on the edge often and want a rigid perimeter

• You regularly overheat and need an active cooling design

We used Cloud One nightly for 21 days and rotated sleep positions so the first few nights did not determine the result. Following our standard mattress evaluation, we checked support, cooling, pressure relief, motion isolation, responsiveness, and edge support. We also tracked foam recovery after repeated compression and compared the measured height with the listed specification.

Our sample expanded to 10.9 inches and felt like a 5 out of 10 for firmness, which matches its medium-soft positioning. Carlos (5'11", 175 pounds) found that the deeper foam held his hips level on his back without an abrupt transition between layers. Mia (5'4", 125 pounds) could settle onto her side without the shoulder pressure she notices on firmer foam. Marcus (6'1", 230 pounds) liked the cushioned surface for back sleeping but felt his hips sink too far when he stayed on his stomach.

The objective checks told the same story. After 30 minutes of contact, the surface rose from 70.8°F to 77.4°F and cooled to 72.6°F within 10 minutes after we got up—reasonable for all-foam, but not a strong result for a hot sleeper. In three motion trials, a 10-pound ball dropped from six inches produced an average peak of 0.12 g at a sensor 12 inches away, and the vibration settled in 0.8 seconds. The two reinforced long edges helped when lying near the side, but under a 150-pound load the edge compressed 3.2 inches versus 2.0 inches at the center. That difference was most noticeable while sitting to put on shoes.

What we liked

• The shoulder and outer hip settled comfortably without feeling swallowed by the foam

• Partner movement stayed quiet and localized, even during repeated entry and exit tests

• The responsive top foam made rolling from side to back easier than on slow memory foam

Who it is best for

• Lightweight and average-weight side sleepers who want a plush surface

• Back sleepers who like contouring but still want steady support under the waist

• Couples who value low motion transfer more than bounce

Where it falls short

• The foam holds more warmth than a breathable hybrid or dedicated cooling mattress

• The long-side reinforcement helps with sleeping space but remains soft for frequent sitting

• Heavier stomach sleepers may sink too deeply through the hips

• Type: 11-inch all-foam mattress

• Feel: Medium-soft and responsive

• Sizes and dimensions:

  • Twin: 38" x 75"

  • Twin XL: 38" x 80"

  • Full: 53" x 75"

  • Queen: 60" x 80"

  • King: 76" x 80"

  • California King: 72" x 84"

• Construction: Cozy knit cover, breathable open-cell comfort foam, Align+ memory foam, a Core+ polyurethane-foam base, and firm foam reinforcement along both long sides

• Shipping: Free within the contiguous U.S.; added fees apply to Alaska and Hawaii. UPS Standard delivery typically takes 2–8 business days after the order ships.

• Returns: Free within the 100-night trial, after the required 30-night adjustment period

• Warranty: 10-year limited mattress warranty

• Cover care: Do not remove the zippered cover; spot-clean with a little water and mild detergent

• Base: Use a firm, solid surface. On a slatted frame, use flat wooden slats no more than four inches apart.

• Other details: Fiberglass-free; designed and assembled in the USA

Begin with the feel you want when you choose a mattress. Cloud One sits at about 5 out of 10 on our firmness scale, so it suits sleepers who want visible contouring without the slow response of dense memory foam. Then consider body weight and sleep position. Side sleepers receive the most obvious pressure relief, and average-weight back sleepers get a comfortable mix of contouring and support. Lighter or occasional stomach sleepers may be comfortable, but heavier full-time stomach sleepers will usually need a firmer surface.

Temperature and edge use matter as well. Cloud One breathes better than dense, slow-response foam, but it is not an active cooling mattress. Its two reinforced long sides preserve more usable sleeping room, yet they do not feel as rigid as a strong hybrid edge when you sit down.

Choose Cloud One if you want a medium-soft foam bed with excellent motion isolation, strong pressure relief, and a quicker response than traditional memory foam. It is also the simplest choice of this group if you want a plush bed-in-a-box without paying for coils or specialized cooling.

TEMPUR-Cloud has a slower, deeper contour and an unmistakably dense memory-foam feel. It isolates movement extremely well, but the foam version is harder to reposition on and usually costs more. Its hybrid version adds bounce and stronger edge support.

Saatva Classic feels much more lifted and springy. Its dual-coil construction moves more air and its high-density perimeter is better for sitting or sleeping at the edge. It also costs more and transfers more movement than Cloud One.

Leesa Original is the closest price comparison. Its all-foam build has a more neutral medium feel, making it a better choice for sleepers who find Cloud One too plush. Cloud One offers deeper cushioning, while Leesa feels flatter and more balanced.

• Use the first 30 nights of the trial period before making a final firmness decision.

• Pair the mattress with breathable sheets and lighter bedding if you tend to sleep warm.

• Side sleepers may need a slightly taller pillow to keep the neck level with the cushioned shoulder.

• Back sleepers with lower-back tension can try a thin pillow beneath the knees.

• Rotate the mattress from head to foot every few months to distribute wear.

• Let the mattress expand and air out fully after unboxing before judging the feel.

• Check the bed frame regularly; wide slat gaps can make an all-foam mattress feel softer.