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One

Foam Mattress
Price: $1,745 Sale Price: $1,300
25% OFF

One

Foam Mattress
Price: $1,745 Sale Price: $1,300
25% OFF
5 out of 5 Customer Rating
Make it a bundle: You save $213!
Waterproof Mattress Protector
Waterproof Mattress Protector
Guards against dirt, spills, and normal wear and tear.
$109
The Foundation
The Foundation
Created to support your mattress. Set it up in minutes with easy, no-tool assembly.
$399
Waterproof Mattress Protector
+
The Foundation
Waterproof Mattress Protector and The Foundation. You save $213!
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In-stock, ships within 1-2 days | Free shipping & returns
One
Price: $1,745 Sale Price: $1,300

Try it in a store near you
$480 upgrade
Dream
  • Upgrade to Hybrid Technology
  • Added Zoned Support™
  • Responsive Medium Feel

Inside the One

Our signature all foam mattress designed with a responsive yet supportive medium-firm feel is perfect for any sleep style.

  • RESPONSIVE FEEL: A supportive medium-firm feel with the perfect bit of bounce.
  • BREATHABLE FOAMS: Breathe Flex Foam allows airflow to soothe you to sleep.
  • PRESSURE RELIEVING: Align Memory Foam cradles your body to help you stay asleep.
  • SUPPORTIVE CORE: A firm Casper Core prevents sinking and sagging.

While the Original & The Casper has gone to bed, you can experience the latest in cutting-edge coziness with our new mattress, the One.

Don't Lose Sleep

Twin

38" W x 75" L x 11" H x 42lbs

Twin XL

38" W x 80" L x 11" H x 42lbs

Full

53" W x 75" L x 11" H x 56lbs

Queen

60" W x 80" L x 11" H x 66lbs

King

76" W x 80" L x 11" H x 85lbs

California King

72" W x 84" L x 11" H x 83lbs

Split King

76" W x 80" L x 11" H x 85lbs

  • Top layer of breathable polyurethane foam.
  • Second layer of memory foam.
  • Durable base of polyurethane foam.

Free shipping and free returns*

*Additional shipping fees apply to Alaska and Hawaii. Terms and Conditions apply.

Subject to 10-year Limited Mattress Warranty. Learn More

  • Back and stomach sleepers.
  • The no-brainer mattress choice.

One features an all foam construction with a medium feel, making it perfect for any sleep style.

Got questions?

Our friendly Sleep Specialists are here to help. Give us a call now or visit your local store.

Sleep Easier

Cozy Cover

A buttery soft and airy knit blend helps make your mattress even cozier.

Sleep Deeper

Breathe Flex Foam

A responsive and breathable open cell foam soothes you to sleep with the perfect bit of bounce.

Sleep All Night

Align Memory Foam

Pressure-relieving memory foam cradles your body to help you stay asleep. 

Compare This Mattress!

Not every mattress is one size fits all, so we are here to help you tell the difference between our models.

YOU'RE VIEWING

One

Size: California King
Price: $1,745 Sale Price: $1,300
$480 UPGRADE

Dream

Size: California King
Price: $2,375 Sale Price: $1,780
Mattress Feel
We know that every body is unique, so we design our mattresses with a range of firmnesses.
Medium-Firm
Firm
Soft
Medium
Firm
Soft
Ergonomic Support
Support where you need it most. Firmer foam under your hips, waist, and lower back and precisely cut channels designed to help align your spine.
Zoned Support
Cooling & Breathability
Keep cool all night with breathable foams and Snow Technology.
Breathe Flex Foam
Breathe Flex Foam
Mattress Construction
We offer both soothing all-foam and responsive hybrid constructions to make sure every sleeper gets their favorite feel.
11"

Foam Mattress

12"

Hybrid Mattress

Mattress Layers
Every Casper mattress is engineered with features and layers you need for better sleep.
4

Layers

5

Layers


Details

The no-brainer mattress choice.

Ratings & Reviews

21995 Reviews
4.5 out of 5.0

Review this product

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  • (5 Stars)

    Great Mattress for Great Sleep

    When my husband and I first laid down on this mattress we were honestly concerned that it was going to be too firm, but we’re approaching almost two weeks of ownership and I don’t think either of us has slept this well in years. I have chronic pain that focuses on my back and hips and I’m used to waking up as sore as I went to bed, but I’m actually seeing some moderate improvement in the morning. Moderate improvement might not sound like a miracle to most people, but it feels like one to me. We’re very happy with our purchase, and would definitely buy another mattress from Casper.

    Product: One

    Disclaimer: This review is of a mattress of a comparable feel.

  • (5 Stars)

    Fantastic mattress!

    The One Mattress is fantastic! This is my second Casper mattress and I can't wait to recommend it to my friends!

    Product: One

    Disclaimer: This review is of a mattress of a comparable feel.

  • (5 Stars)

    Best bed yet

    I actually had to hunt down the AirBNB we stayed at to find the mattress. We had tried 3 others and they couldn't compete. Very firm bed but as a side sleeper, it's just as great for me as my stomach sleeping husband. I know reviews state otherwise, but not having my hip sink 3-6 inches while the mattress stays level and firm is amazing. I'd pay double for this bed.

    Product: One

    Disclaimer: This review is of a mattress of a comparable feel.

  • (5 Stars)

    Foam is great!

    I love me all foam mattress. Simple as. I've been sleeping on Casper memory foam for 8 years now and decided to get a second mattress from them. While firm, it does have a decent amount of give to it that feels like it cradles you while you sleep. Very comfortable, even if sleeping on your side.

    Product: One

    Disclaimer: This review is of a mattress of a comparable feel.

  • (5 Stars)

    Great for humans, great for pets!

    I have an original Casper Mattress, and purchased a One Mattress for another bed. The One is as wonderful and as comfortable as the original! It felt like my bed as soon as I laid down. My cat immediately got under the covers and slept like a rock. We joked that we were glad to buy the cat a new mattress. I suspect the same effect happens with dogs, ferrets, parrots, and any other cuddly pal!

    Product: One

    Disclaimer: This review is of a mattress of a comparable feel.

Showing 1 to 5 of 21,995 results

Frequently asked
questions

All of our mattresses are specifically designed to sleep cool. We run thermal imaging tests and sweat tests to make sure our mattresses feel nice and breezy throughout the night to keep you comfortable.

If sleeping hot is a challenge for you, Snow Technology is our most advanced solution to nighttime overheating. The combination of HeatDelete™ Bands, Phase Change Material, and cooling Snow Cover keep you comfortably cool from the moment you crawl into bed.

The “One” is the firmest mattress in our collection. It is an all-foam mattress made with Breath Flex Foam, Align Memory Foam, and a Casper Core for those seeking the best memory foam mattress experience at an affordable price. The One is firmer than our previous value model, The Casper.

If you loved the Casper you'll love the upgraded One. This all-in-one sleep solution is slightly firmer but still has the signature Casper feel. The all foam mattress is made with Breath Flex Foam, Align Memory Foam, and a Casper Core, making it an excellent choice for anyone looking for a memory foam mattress upgrade.

Casper mattresses are designed to work on a firm, solid surface like our foundation, platform, or adjustable bed frame. Having the correct support ensures the performance and longevity of memory foam mattresses.

For slatted frames, we recommend using bed slats that are flat (not bowed), wooden, and no more than 4 inches apart.

We do! For those who aren’t familiar, a split king basically means the frame comes in two parts. With an adjustable base, the two parts are able to work separately or sync together — so you can use the base with two twin XL mattresses or a single king mattress.


Our Cal king adjustable base is also split, but can only be used with our Cal king sized mattress.

A mattress in a box is a mattress that’s compressed in an air-sealed bag and rolled tight so that it can fit into a box that’s easier to maneuver than a traditional mattress. Allowing you the flexibility and convenience of picking your mattress online and having it easily delivered to your door.

When you receive the mattress, all you’ll need to do is pull it out of its packaging, lay it flat on your bed frame or floor, and let it expand.

Foam and hybrid mattresses can be slept on almost right away but may take up to 48 hours to expand fully. Our Snow mattresses are primarily made with memory foam and can take up to 72 hours to expand fully.