Illustration of a foam mattress cut away to show its typical layers — rendered artwork, not a product photo

Illustration · typical all-foam build

Casper Cloud One

A medium-soft all-foam mattress from Casper: about 4/10 for firmness, converted from the brand's own firmness label. Scores highest for side sleepers: 82/100, 5th of 26 ranked.

9/10 motion isolation

Manufacturer site · casper.com · not an affiliate link

Match Score

Strong match

Typical side sleeper, 160 lb · 5th of 26 ranked

Your weight, temperature and partner can move this a lot.

Firmness: Medium-soft 4/10
Queen price: $1,099
Trial: 100 nights
Warranty: 10 years

Match Score

Scored for the way people sleep.

The same engine as the quiz, run for a typical sleeper in each position. Reference sleeper: 160 lb, sleeps neither hot nor cold, sleeps alone, no stated firmness preference. Only the sleep position changes.

Model v0.2. Rank is among the mattresses with enough data to rank, for that same sleeper, as on the category pages. How scores work

Get your full score

Side sleeper
82/100
Strong match · 5th of 26 ranked for this sleeper
Strong match for a side sleeper: strongest on pressure relief and support & alignment.
Back sleeper
70/100
Good match · 26th of 26 ranked for this sleeper
Good match for a back sleeper: strongest on pressure relief and cooling.
Stomach sleeper
60/100
Fair match · 26th of 26 ranked for this sleeper
Fair match for a stomach sleeper: strongest on pressure relief and cooling.
Combination sleeper
71/100
Good match · 26th of 26 ranked for this sleeper
Good match for a combination sleeper: strongest on pressure relief and cooling.

Inside

Inspect the mattress.

A typical all-foam build, layer by layer. Select a layer to see what it does, which parts of Casper's published materials list belong to it, and how that part of the bed scores.

Select a layer

Illustration of a typical all-foam build, not a teardown of the Casper Cloud One.

Layer 01 of 04

Cooling Cover

The fabric layer you lie on. It is often a quilted or knit panel; breathable weaves help move heat and moisture away from the body, which is one input to how warm a bed sleeps.

Mainly drives cooling.

From Casper's materials list

Cozy Cover

Matched to this layer by component name. Thicknesses and densities aren't published.

Performance · Typical side sleeper, 160 lb

Cooling75/100
Sourced · independent rating 7.5/10

Specifications

The specifications.

All 8 core specs on file

Source: Casper (opens in a new tab) — official product page, checked 25 Sep 2026.

Firmness: Medium-soft 4/10; Converted from the brand's own firmness label. Medium-soft (manufacturer).
Construction: All-foam; 5 components listed by Casper. See them by layer above.
Height: 11 in
Queen price: $1,099; Checked 25 Sep 2026.
Trial: 100 nights; Free shipping and free returns. Returns can be initiated after the 30-night adjustment period.
Warranty: 10 years
Cooling: 7.5/10; Independent rating
Motion isolation: 9/10; Independent rating
Edge support: 6.5/10; Independent rating
Durability: Not yet rated