Skip disability assistance statement.

Welcome to our website! As we have the ability to list over one million items on our website (our selection changes all of the time), it is not feasible for a company our size to record and playback the descriptions on every item on our website. However, if you have a disability we are here to help you. Please call our disability services phone line at 251-304-1101 during regular business hours and one of our kind and friendly personal shoppers will help you navigate through our website, help conduct advanced searches, help you choose the item you are looking for with the specifications you are seeking, read you the specifications of any item and consult with you about the products themselves. There is no charge for the help of this personal shopper for anyone with a disability. Finally, your personal shopper will explain our Privacy Policy and Terms of Service, and help you place an order if you so desire.

King The One

Casper

Features

  • Cozy Cover
  • Breathe Flex Foam
  • Align Memory Foam

Quick Specs

  • Brand: CASPER
  • Type: Tight Top
  • Width: 11"
  • Height: 76"
  • Depth: 80"

See More

 

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

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

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

Features

  • Cozy Cover
  • Breathe Flex Foam
  • Align Memory Foam
Measurements & dimensions

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







Materials & certifications

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


Best Solution For

  • 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.























{"@context":"http://schema.org/","@type":"Product","@id":"https://casper.com/mattresses/casper-one-foam.html","name":"The One","description":"The mattress that broke the Internet-reimagined.","productID":"casper-one-foam","sku":"casper-one-foam","url":"https://casper.com/mattresses/casper-one-foam.html","brand":{"@type":"Brand","name":"Casper"},"image":["https://casper.com/dw/image/v2/BFHV_PRD/on/demandware.static/-/Sites-casper-master/default/dwa746511a/product_images/One-Mattress/One-V2.jpg'sw=1023&sh=1023&sm=fit","https://casper.com/dw/image/v2/BFHV_PRD/on/demandware.static/-/Sites-casper-master/default/dwa1a30051/product_images/One-Mattress/One-Hi-Res.jpg'sw=1023&sh=1023&sm=fit","https://casper.com/dw/image/v2/BFHV_PRD/on/demandware.static/-/Sites-casper-master/default/dw0c3a1f85/product_images/One-Mattress/One-Features-V4.jpg'sw=1023&sh=1023&sm=fit","https://casper.com/dw/image/v2/BFHV_PRD/on/demandware.static/-/Sites-casper-master/default/dwf4c9d27f/product_images/One-Mattress/One-Room-V2.jpg'sw=1023&sh=1023&sm=fit","https://casper.com/dw/image/v2/BFHV_PRD/on/demandware.static/-/Sites-casper-master/default/dwe8c424f8/product_images/One-Mattress/One-Layers-V4.jpg'sw=1023&sh=1023&sm=fit","https://casper.com/dw/image/v2/BFHV_PRD/on/demandware.static/-/Sites-casper-master/default/dw0747faac/product_images/One-Mattress/UnboxV1.png'sw=1023&sh=1023&sm=fit","https://casper.com/dw/image/v2/BFHV_PRD/on/demandware.static/-/Sites-casper-master/default/dw15e146f1/product_images/One-Mattress/One-PDP-Test-Hero.jpg'sw=1023&sh=1023&sm=fit"],"offers":{"url":"/mattresses/casper-one-foam.html'size=queen","@type":"Offer","priceCurrency":"USD","price":"799.00","availability":"http://schema.org/InStock"},"aggregateRating":{"@type":"AggregateRating","ratingValue":"4.5","reviewCount":"22355","bestRating":5}} 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











See all reviews



























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: Queen

Price: $999 Sale Price: $799

















$506 UPGRADE









Dream


Size: Queen

Price: $1,875 Sale Price: $1,305





















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























.experience-custom_assets-bvreviews { visibility:hidden; height:0px; overflow:hidden; }



Details Details


The mattress that broke the Internet-reimagined.











Questions








Ratings & Reviews
22,355 Reviews










4.5 out of 5.0

5 Stars




(15,945)



4 Stars




(2,881)



3 Stars




(1,613)



2 Stars




(960)



1 Stars




(956)



Review this product
Place a review Adding a review will require a valid email address for verification.



Filter reviews by:



All Models The One The Casper Mattress Original



Select Ratings 5 Stars 4 Stars 3 Stars 2 Stars 1 Stars













(5 Stars)



Heavenly comfort!

OMG!

Product: The One



Helene


5 days ago














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

This review was incentivized.






(5 Stars)



Heavenly comfort!

OMG!

Product: The One



Helene


5 days ago














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

This review was incentivized.






(5 Stars)



So comfy!!

My husband and I have both been struggling with back pain, but this helped immensely.

Product: The One



Caroline


6 days ago














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

This review was incentivized.






(5 Stars)



like sleeping on a recovery bed, or cotton cloud

I love resting all day on my mattress, since after my postpartum, I have felt a great recovery in my body and the pain has disappeared.

Product: The One



Mileydy


6 days ago














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

This review was incentivized.






(5 Stars)



like sleeping on a recovery bed, or cotton cloud

I love resting all day on my mattress, since after my postpartum, I have felt a great recovery in my body and the pain has disappeared.

Product: The One



Mileydy


6 days ago














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

This review was incentivized.




Showing 1 to 5 of 22,355 results

Previous Next





















Elevate your sleep game





10% OFF
Quick view

Review Rating: 4.1 stars



(8959)



Original

From Price: $65 Sale Price: $58.50



Standard or King




10% OFF
Quick view

Review Rating: 4.5 stars



(450)



Foundation

From Price: $299 Sale Price: $269.10



6 sizes




10% OFF
Quick view

Review Rating: 4.1 stars



(1273)



Waterproof Mattress Protector

From Price: $89 Sale Price: $80.10



6 sizes




10% OFF
Quick view

Review Rating: 3.8 stars



(87)



Hybrid Snow Pillow

From Price: $149 Sale Price: $134.10



Standard or King















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.

+1 888.498.0003

Chat now Try in store

















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.








Sleep now, pay over time.






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.



document.addEventListener('DOMContentLoaded', function() { // Find the accrue-savings-placement element const accrueElement = document.querySelector('accrue-savings-placement'); // Clone the element const clone = accrueElement.cloneNode(true); // Find the div with class 'katapult-price-calculator' const referenceDiv = document.querySelector('.katapult-price-calculator'); // Insert the cloned element after the 'katapult-price-calculator' div if (referenceDiv) { referenceDiv.insertAdjacentElement('afterend', clone); } }); accrue-savings-placement { margin-top:1rem; } #financing-options .text-and-icon-block-layout__content .experience-components { flex-wrap:wrap } .Text_typography_small__124g65bm { font-size: 12px !important; color:#151515 !important; letter-spacing:0.6px !important; max-width: 350px; } #accrue-billboard .Text_typography_small__124g65bm { font-size: 16px !important; max-width: auto; } .text-and-icon-block-asset .image-wrap+.description { margin-top:0px; } @media (min-width: 576px) { #financing-options .text-and-icon-block-layout__content .experience-components { flex-wrap:no-wrap; } .text-and-icon-block-asset .image-wrap+.description { margin-top:1rem; } } @media (max-width: 575.98px) { .text-and-icon-block-layout__content .text-and-icon-block-asset .image-wrap img { width: 120px; height: 120px; } } @media (max-width: 575.98px) { .text-and-icon-block-layout__content .text-and-icon-block-asset .description { display: block; } }









Explore financing options







Frequently asked
questions



Does The One memory foam mattress sleep hot?

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.




Which is the firmest mattress in the assortment?

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.




I have The Casper and I wanted another. Which mattress should I buy now?

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.




What kinds of bed frames are compatible with Casper mattresses?

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.




I need a split king base. Do you offer that?

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.




What is a mattress in a box? How long does it take for a Casper mattress to expand?

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.
















Quick Specs


  • Manufacturer

  • Brand: CASPER

  • Appearance

  • Type: Tight Top

  • Dimensions

  • Width: 11"
  • Height: 76"
  • Depth: 80"
Poster Image

Watch Video

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

This limited Mattress Warranty applies to the following Defects: Deterioration causing the Mattress to have a visible indentation greater than one (1) inch that is not associated with an indentation or sag which results from use of an improper or unsupportive foundation or adjustable bed base. Normal wear requires that a Mattress be continuously supported by a matching foundation or adjustable bed base with a proper bed frame sufficient to support the collective weight of the Mattress and foundation. Any physical flaw in the Mattress that causes the foam material to split or crack, despite normal usage and proper handling. Any manufacturing defect in the zipper assembly of the Mattress Cover.

Extended warranties are usually very inexpensive and can save you thousands in the future. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Mattresses can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new bedding should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.