The One
Premium Foam Mattress
BEST SELLER
The mattress that broke the Internet—reimagined. Three layers of supportive and breathable foam relieve the day’s pressure.
BEST SELLER
BEST SELLER
The One
Premium Foam Mattress
BEST SELLER
Make it a bundle: You save $55!
Original Casper Pillow
Our dreamy down-alternative pillow that is both soft and supportive.
$65
Waterproof Mattress Protector
Guards against dirt, spills, and normal wear and tear.
$89
+
Original Casper Pillow and Waterproof Mattress Protector. You save $55!
In-stock, ships in 2-5 business days | Free shipping & returns
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
The mattress that broke the Internet—reimagined.
Our best all-foam mattress, expertly designed to meet your sleep needs at an affordable price. 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.
- DREAMY SLEEP, DREAMIER PRICE: Enjoy deep sleep at an affordable price.
Twin
38" W x 75" L x 11" H 47lbs
Twin XL
38" W x 80" L x 11" H 50lbs
Full
53" W x 75" L x 11" H 64lbs
Queen
60" W x 80" L x 11" H 76lbs
King
76" W x 80" L x 11" H 94lbs
California King
72" W x 84" L x 11" H 93lbs
Split King
76" W x 80" L x 11" H x 100lbs
- 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.
Classic Casper Feel
Responsive, supportive foam with the perfect bit of bounce our sleepers love.
Long-Lasting Support
Layers of premium foam are engineered to be as durable as they are cozy.
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
"I actually had to hunt down the AirBNB we stayed at to find this mattress. We had tried 3 others and they couldn't compete... as a side sleeper, it's just as great for me and my stomach sleeping husband... I'd pay double for this bed."
Karie
Port Charlotte, FL
"After 2 nights on my new Casper mattress I’m sleeping better than in years. I haven’t been able to sleep on my side for long periods...but now I can without pressure on my joints. I’m no longer waking up with body aches and soreness."
Donna
Colorado City, CO
"I have never slept better, I didn't realize what sleep was before this mattress, life changing."
Joshua
Oxford, CT
Compare This Mattress
Not every mattress is for everyone. Take a look at our other models to see which is the best for you.
YOU'RE VIEWING
The One
Size: Twin XL
$596 UPGRADE
Dream
Size: Twin XL
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
4
Layers
Details
The mattress that broke the Internet—reimagined.
Ratings & Reviews
22,286 Reviews
4.5 out of 5.0
Review this product
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(5 Stars)
Best ever
Very comfortable bed best ever actually - bought one because my daughters guest room has one - and I have had the best nights ever sleeping on a Casper
Product: The One
Disclaimer: This review is of a mattress of comparable feel.
This review was incentivized.
-
(5 Stars)
Another win
Delivery was quick. Well packed. It is in the guest bedroom and got rave reviews. I laid on it for awhile and it was quite comfortable.
Product: The One
Disclaimer: This review is of a mattress of comparable feel.
-
(5 Stars)
Amazing sleep
Amazing
Product: The One
Disclaimer: This review is of a mattress of comparable feel.
This review was incentivized.
-
(5 Stars)
Great customer experience
Had a fantastic experience with Casper. Had an older Casper mattress that was exchanged for a new one. Had to submit pictures and video and was able to get the new mattress in less than a weeks time.
Product: The One
Disclaimer: This review is of a mattress of comparable feel.
This review was incentivized.
-
(5 Stars)
Never want to leave this bed
After a good ten years of using a slowly sinking pillow top mattress, my husband and I needed to find something new. We were looking for something that would not only keep me cool at night, but a mattress that allows us to shuffle off and on without waking up the other. I did my research and found Casper’s The One checked all our boxes. We’ve been sleeping on it for almost a month now, and it’s everything we’ve been looking for. I’ve been getting the best sleep I’ve had in years. I wish we bought this sooner!!
Product: The One
Disclaimer: This review is of a mattress of comparable feel.
Showing 1 to 5 of 22,286 results
Elevate your sleep game
.jpg?sw=540&sh=333&sm=cut "The Foundation")
Speak to a Sleep Specialist
Our Sleep Specialists are dedicated to helping you find the mattress of your dreams. Give us a call or chat with us now.
Included with every Casper Mattress
We'll replace it with a new one
10-year limited warranty*
Send it back for free
100-night risk-free trial*
The shipping is on us
Free, no-contact delivery*
Buy now, pay over time
Quick, simple financing options
Let us do the heavy lifting
Optional white glove delivery*
* Select products ineligible for free shipping or returns where indicated. Additional shipping fees apply to AK and HI.
Flexible payments - pay over 3-24 months with rates as low as 0% APR, subject to eligibility.
Zero credit required. Lease to own. Pay over time on your schedule.
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 you are a hot sleeper, 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 type 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 affordable memory foam mattress experience. 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 the best choice for anyone looking for an inexpensive 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.