Casper's The One mattress on a bed frame with a blanket and pillows on top in a bedroom setting. At the bottom of the image is the Consumer Reports logo. The One is the top-rated all-foam mattress of 2025. See below to learn more. Consumer Reports does not endorse products or service.
A person's hand presses down to feel The One mattress. It is medium firm and feels responsive and lively.
A person lying on their side on The One mattress. Above the mattress is a list of its features: All-foam design has 3 layers of supportive, pressure-relieving foams. Breathable layers have open-cell foam to prevent overheating. Cozy engineering has wrapped the mattress in a soft-knit cover for extra coziness.
Graphic image labeling the layers of The One mattress. A breathable comfort layer helps you get cozy. Cradling memory foam keeps you aligned and asleep. A durable foam base stays supportive, year after year.
A couple lying on The One mattress tosses a pillow back and forth between themselves
Decade of durability, fiberglass-free, and designed and assembled in the USA.
Video of a couple carrying their new Casper mattress in its box up the stairs and setting it up in their bedroom
Select your foam model:
Casper

The One

BEST SELLER

Premium Foam Mattress

Sale price$749
Casper's The One mattress on a bed frame with a blanket and pillows on top in a bedroom setting. At the bottom of the image is the Consumer Reports logo. The One is the top-rated all-foam mattress of 2025. See below to learn more. Consumer Reports does not endorse products or service.
A person's hand presses down to feel The One mattress. It is medium firm and feels responsive and lively.
A person lying on their side on The One mattress. Above the mattress is a list of its features: All-foam design has 3 layers of supportive, pressure-relieving foams. Breathable layers have open-cell foam to prevent overheating. Cozy engineering has wrapped the mattress in a soft-knit cover for extra coziness.
Graphic image labeling the layers of The One mattress. A breathable comfort layer helps you get cozy. Cradling memory foam keeps you aligned and asleep. A durable foam base stays supportive, year after year.
A couple lying on The One mattress tosses a pillow back and forth between themselves
Decade of durability, fiberglass-free, and designed and assembled in the USA.
Video of a couple carrying their new Casper mattress in its box up the stairs and setting it up in their bedroom

As comfortable as it is affordable.

Expertly engineered to solve your sleep needs without breaking the bank, our signature foam mattress features three layers of cradling foam and a responsive yet supportive medium-firm feel sleepers love.

Select your foam model:
Size Guide

Which mattress size is right for you?

When picking your next mattress, it’s more than just personal preference—two key things to keep in mind are how much room you have and who’s sleeping in the bed.

King Dimensions 76"x80", California King Dimensions 72"x84"

Upgrading to a King mattress is a game-changer if you’re sharing space with kids or pets. And if you’re tall, the extra length of a California King could be just right.

Full Dimensions 53"x75", Queen Dimensions 60"x80"

A Full size mattress is ideal for young adults or those with a smaller bedroom, while a Queen is the top pick for couples or anyone who enjoys extra space to sprawl out.

Twin Dimensions 38"x75", Twin XL Dimensions 38"x80"

The Twin is the smallest option, ideal for single sleepers. While the Twin XL is a dorm favorite it can also create a Split King if you purchase two.

Which pillow size is right for you?

Standard vs King Pillow Sizing
Pillow sizes can vary, but standard pillows, also known as queen pillows, are typically suitable for all types of sleepers. If you prefer extra space or need to fill the width of a larger mattress, king-size pillows, which are about 30% larger, are a great choice.
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Our friendly Sleep Specialists are dedicated to helping you find the mattress of your dreams!

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100-night risk-free trial*
10-year limited warranty*
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Size
Sale price$749
Solid green background with white stars scattered throughout. Inside it appear the words Consumer Reports with its CR logo next to it.
Comfort You Can Count On

The One is Consumer Reports' top-rated all-foam Mattress of 2025.*

Read the report

*Consumer Reports does not endorse products or service.

Let's take a look under the covers.

Expanded view of the layers comprising The One mattress
Icon of inner foam design

Casper Core

Long-lasting supportive base prevents sinking and sagging.
Icon of a person lying on their side on mattress

Align Memory Foam

Cradles the natural curve of your body to help you stay asleep.
Icon of air blowing

Breathe Flex Foam

Open-cell foam enhances airflow to prevent overheating.
Icon of perimeter of bed with moon and zzz's

Cozy Cover

Soft knit cover makes your mattress even cozier.
If it's in a Casper mattress, it helps you sleep.

See the thoughtful engineering behind The One.

A Casper mattress in the manufacturing facility with a rolling machine on top to guarantee support
A Casper mattress in the manufacturing facility with a rolling machine on top to guarantee support
Decade of durability.

The Casper Core is engineered to support you night after night and year after year.

Get our best savings when you Build Your Own Bundle.

Even your bed needs a bed. Build your sleep setup from the ground up.

Stop-motion video of the Adjustable Base Max's top and bottom being adjusted to various angles. Enjoy endless cozy configurations for reading, relaxing, sleeping, or any bedroom activity.
Stop-motion video of the Adjustable Base Max's top and bottom being adjusted to various angles. Enjoy endless cozy configurations for reading, relaxing, sleeping, or any bedroom activity.
Adjustable Bed Frames
The ultimate sleep setup, with control at your fingertips.

Casper has three levels of Adjustable Bed Frames designed to work with any Casper mattress. You can use them on their own, on a Casper slatted frame, or inside your existing frame (just be sure to measure). Every base includes head and foot lift plus Zero Gravity mode, while Pro and Max feature upgraded lumbar support and more. This setup is perfect for sleepers who want full customization and ultimate relaxation (warning: there’s no going back).

Build Your Own Mattress Bundle Shop Adjustable Bed Frames

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BEST SELLER
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Sale price$749
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Mattress Feel
Medium-Firm
Firm Soft
Medium-Soft
Firm Soft
Ergonomic Support
Continuous Support Continuous Support Expertly engineered layers of foam that provide consistent support and long-term durability.
Continuous Support + Edge Support Continuous Support + Edge Support Expertly engineered layers of foam that provide consistent support edge-to-edge and long term durability.
Cooling & Breathability
Breathe Flex Foam Breathe Flex Foam A responsive and breathable open cell foam soothes you to sleep.
Breathe Flex Foam Breathe Flex Foam A responsive and breathable open cell foam soothes you to sleep.
Mattress Construction
11" Foam Mattress
11" Foam Mattress
Mattress Layers
4 Layers
4 Layers

Product specifications

Your story is our story.
Casper's The One mattress on a bed frame with a blanket and pillows on top in a bedroom setting. At the bottom of the image is the Consumer Reports logo. The One is the top-rated all-foam mattress of 2025. See below to learn more. Consumer Reports does not endorse products or service.
The One

The mattress that broke the Internet—reimagined.
Casper's The One mattress on a bed frame with a blanket and pillows on top in a bedroom setting. At the bottom of the image is the Consumer Reports logo. The One is the top-rated all-foam mattress of 2025. See below to learn more. Consumer Reports does not endorse products or service.
The One

The mattress that broke the Internet—reimagined.
mattress protector on Casper's The One mattress on a Foundation
Best-Selling Bundle
Casper's The One mattress on a bed frame with a blanket and pillows on top in a bedroom setting. At the bottom of the image is the Consumer Reports logo. The One is the top-rated all-foam mattress of 2025. See below to learn more. Consumer Reports does not endorse products or service.
The One

The mattress that broke the Internet—reimagined.
Casper's Foundation
Foundation
breathable mattress protector, folded
Breathable Mattress Protector

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Frequently asked questions

Still have questions?

Our Sleep Specialists are dedicated to helping you find the mattress of your dreams. Give us a call or chat with us now.

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One person standing next to a made bed with another sitting on it, both smiling. One person standing next to a made bed with another sitting on it, both smiling.

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