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The One

Premium Foam Mattress
Price: $1,745 Sale Price: $1,395
$350 OFF

The One

Premium Foam Mattress
Price: $1,745 Sale Price: $1,395
$350 OFF
4.7 out of 5 Customer Rating
Make it a bundle: You save $56!
Original Pillow Double Pack
Original Pillow Double Pack
Our dreamy down-alternative pillow that is both soft and supportive.
$170
Waterproof Mattress Protector
Waterproof Mattress Protector
Guards against dirt, spills, and normal wear and tear.
$109
Original Pillow Double Pack
+
Waterproof Mattress Protector
Original Pillow Double Pack and Waterproof Mattress Protector. You save $56!
In-stock, ships within 1-2 days | Free shipping & returns
The One
Price: $1,745 Sale Price: $1,395

Got questions?

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

Give us a call: +1 888.498.0003
Try it in a store near you

The mattress that broke the Internet—reimagined.

Our best all-foam mattress, expertly designed to meet any sleep needs. Featuring a responsive yet supportive medium-firm feel you’ll love.

  • OVERHEATING IS OVER: Every layer of foam is designed for all night breathability.
  • BEST NIGHT’S REST: Three layers of supportive, pressure-relieving foam soothe your body.
  • THE FEEL SLEEPERS LOVE: Uniquely supportive with the perfect bit of bounce.

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.

Let's take a look under the covers

The One for every body. And everybody.

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Classic Casper Feel

Responsive, supportive foam with the
perfect bit of bounce our sleepers love.

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Long-Lasting Support

Layers of premium foam are engineered to be as durable as they are cozy.

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Perfected Over 10 Years

We redesigned our “one perfect mattress” with 10 years of feedback to make it even more perfect-er.

See why customers love The One

Compare This Mattress

Not every mattress is for everyone. Take a look at our other models to see which is the best for you.

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The One

Size: King
Price: $1,745 Sale Price: $1,395
$500 UPGRADE

Dream

Size: King
Price: $2,375 Sale Price: $1,895
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.
Continuous Support

Expertly engineered layers of foam that provide consistent support and long-term durability.

Zoned Support

Added layer of zoned foam and flex coils give you enhanced support and alignment where you need it most.

Cooling & Breathability
Keep cool all night with breathable foams and Snow Technology.
Breathe Flex Foam

A responsive and breathable open cell foam soothes you to sleep.

Breathe Flex Foam

A responsive and breathable open cell foam soothes you to sleep.

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 mattress that broke the Internet—reimagined.

Ratings & Reviews

21998 Reviews
4.5 out of 5.0

Review this product

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  • (5 Stars)

    Loved it

    Great mattress. Would buy again.

    Product: The One

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

  • (5 Stars)

    Great mattress, great price!

    Bought two of these mattresses to use with Caper adjustable bed frames. Mattresses are light, comfortable, firm but not too firm, and really nice to sleep on. Great for watching TV in bed, too (thanks to the adjustable frame, of course). Overall, would recommend. No real downside to this mattress other than having to give ir time to be fully ready after unpacking. We don't have a lot of extra space here for that, but we found a way to make it work.

    Product: Casper Mattress 2023

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

    Gift Icon This review was incentivized.

  • (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: The One

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

    Gift Icon This review was incentivized.

    Reply from Casper:
    Thanks for choosing Casper! We're so glad to hear that you're both loving The One and resting easier. Give us a shout if you need anything, our specialists are here to assist with all things sleep!
  • (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: The One

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

    Gift Icon This review was incentivized.

  • (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: The One

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

    Gift Icon This review was incentivized.

Showing 1 to 5 of 21,998 results

Included with every Casper mattress

Free shipping and returns*
Free shipping and returns*
100-night risk free mattress trial
100-night risk free mattress trial
10 Year Limited Mattress Warranty*

10 Year Limited Mattress Warranty*

Quick, simple financing options

Quick, simple financing options

Compatible with most bed frames
Compatible with most bed frames

* Select products ineligible for free shipping or returns where indicated. Additional shipping fees apply to AK and HI.

Sleep now, pay over time.

Earn cash rewards
Flexible payments - pay over 3-24 months with rates as low as 0% APR, subject to eligibility.
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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.