Is the Casper One good for side sleepers?

Casper says the zoned support suits side, back and combination sleepers. The softer shoulder zone helps side sleepers, though plush-feel sleepers may find the medium feel firm.

How does the Casper One differ from the original Casper?

The One is an all-foam mattress with zoned support and an open-cell top layer for airflow. It is CertiPUR-US certified and fiberglass-free.

Does the Casper One sleep hot?

The open-cell Breathe Flex Foam top layer moves air better than dense memory foam. Very hot sleepers may still want extra cooling.

Does the Casper One work on an adjustable base?

Yes. The all-foam construction bends with an adjustable base, which is sold separately.

What is included with the Casper One?

The mattress comes with a removable soft knit cover. A foundation or adjustable base is not included.

What certifications does the Casper One carry?

It is CertiPUR-US certified and OEKO-TEX certified, fiberglass-free, and made without ozone-depleting chemicals.

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Home · Mancini's Sleepworld

Casper One Mattress

Name: Casper One Mattress
Brand: Casper
Availability: InStock

Deal score 5.4 · Good deal

$749.00$1,074.00 Mancini's Sleepworld's regular price

You save $325.00 at Mancini's Sleepworld

Deal.ai's agents found this deal on November 11. The store may have changed its price since.

Why it's a great deal

Elsewhere right now: Casper $749.00
Mancini's Sleepworld lists its regular price at $1,074.00: 30% off by its own figures
Rated 4.4 out of 5 by 11,000 buyers

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From Big Sandy Superstore

Signature all-foam mattress with a responsive yet supportive medium-firm feel
Designed to suit any sleep style
Breathe Flex Foam is breathable open-cell foam that allows airflow
Align Memory Foam cradles the body for pressure relief
Firm Casper Core helps prevent sinking and sagging
Reduced motion transfer

Sizes: Twin
Materials: Top layer of breathable polyurethane foam; second layer of memory foam; durable base of polyurethane foam; knit blend cover
Fit: Twin: 38 in. wide x 75 in. long x 11 in. high; medium firm; tight top
Guarantee: 10 Year Limited manufacturer warranty
Shipping: In stock; home delivery as soon as 3 days, or scheduled pickup at certain locations
In the box: Mattress

Specs

Size: California King
Type: Innerspring
Topper Type: Pillowtop
Specialty Style: Adjustable Bed
Thickness: 11 in
Length: 80 in long
Width: 38 in wide
Firmness Level: Medium Firm
Mattress Type: Memory Foam
Certifications: CertiPUR-US certified

About the Casper One Mattress

The Casper One is an all-foam mattress with zoned support: softer foam under the shoulders, firmer foam under the hips and lower back. It has a medium-firm feel, an open-cell Breathe Flex Foam top layer for airflow, and a high-density core base. It is CertiPUR-US certified, fiberglass-free and made in the USA. Consumer Reports named it its top-rated all-foam mattress of 2026, and Casper says 92 percent of buyers keep it past the trial.

Best forBack and stomach sleepersCouples who want quiet motion isolationCombination sleepers who need zoned supportShoppers who want a fiberglass-free all-foam mattress

Pros

Zoned support is softer at the shoulders and firmer at the hips
All-foam build isolates motion, so a partner's movement barely registers
Open-cell top foam sleeps cooler than dense memory foam
CertiPUR-US certified and fiberglass-free
Removable, washable soft knit cover
Consumer Reports' top-rated all-foam mattress of 2026

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