Horrible chemical smell. I had
"Horrible chemical smell. I had two Casper mattresses before and always loved them but this new model is bad. It smells and gives me a headache and I am disappointed about the quality"
Premium Foam Mattress
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.
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.
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.
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.
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?
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.
DECADE OF DURABILITY: Casper mattresses use the highest-quality foams to stay comfortable year after year.
The One foam mattress is especially comfortable for stomach sleepers.
Got Questions? Talk to a Sleep Specialist.
Enter your ZIP code to find the nearest Casper store.
Finding the nearest store…
We’re not in your area yet! Visit a partners store below.
Free, no-contact delivery
100-night risk-free trial*
10-year limited warranty*
A breathable, buttery soft knit cover.
Makes your mattress feel even cozier.
A responsive and breathable open-cell foam.
Designed for great airflow and a little bit of bounce to keep sleepers from feeling overheated or stuck.
Conforming memory foam with continuous support.
Premium foam provides optimal support across the mattress.
A sturdy, high-density foam base layer.
Provides long-lasting support while preventing sinking and sagging.
See the thoughtful engineering behind The One.
The Casper Core is engineered to support you night after night and year after year.
Even your bed needs a bed. Build your sleep setup from the ground up.
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).
Continuous Support
Expertly engineered layers of foam that provide consistent support and long-term durability.
Continuous Support + Edge Support
Expertly engineered layers of foam that provide consistent support edge-to-edge and long term durability.
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.
38" W x 75" L x 11" H
47 lbs
38" W x 80" L x 11" H
50 lbs
53" W x 75" L x 11" H
64 lbs
60" W x 80" L x 11" H
76 lbs
76" W x 80" L x 11" H
94 lbs
72" W x 84" L x 11" H
93 lbs
76" W x 80" L x 11" H
100 lbs
Patents: https://casper.com/pages/patent
Free shipping and free returns* – learn more about Delivery.
*Additional shipping fees apply to Alaska and Hawaii. Terms and Conditions apply.
Returns can be initiated after the 30-Night Adjustment Period.
Subject to 10-year Limited Mattress Warranty. Learn More.
Some states charge a Recycling Fee to help fund their mattress recycling programs. This state-mandated fee is added to the cost of each mattress, foundation, and bed frame you order and is not refundable.
* 92% of Casper customers keep their mattress based on a 12-month cohort of customers who purchased between May 2025-Apr 2026.
Real feedback from customers who have experienced the Casper difference.
We bought "The One" after checking the Consumer Reports review and we're very pleased with our purchase. It arrived quickly, was easy to set up and provides comfortable, even support for 2 adults.
Paula D.
The One
Very comfortable, right firmness and no more waking up with back pain. Would recommend this mattress to anyone who is tired of waking up with aches and pains.
Glenn B.
The One
The balance between comfort and support is spot on. We have bought Casper products - our third mattress and continue to enjoy the comfort.
Scott W.
The One
Overall rating: 4.395441 / 5 from 17899 reviews.
The One mattress offers a luxurious and soft feel, providing great support and comfort. Customers appreciate its fast and efficient delivery, easy unboxing, and high-quality construction. While some users experienced back pain, others found relief from pain in their back, hips, and neck. Customer service is highly praised, though feedback on the smell is mixed.
Review topics: [softness, installation, size, smell, instructions, replacement, frame, firmness, fit, weight, support, problem, comfort, assembly, quality, handles, material, delivery, design, mattress, customer service, looks, feel, sleep, cover, value, box, work, husband, style].
"Horrible chemical smell. I had two Casper mattresses before and always loved them but this new model is bad. It smells and gives me a headache and I am disappointed about the quality"
"Very well constructed. High quality. Does have a discoloration in the fabric on top right side. We are having a bit of discomfort sleeping . Aching shoulders and hips upon awakening. No cording on the sides to assist getting up (husband has had 9 prior back surgeries)"
"The mattress strikes a great balance between comfort and support, and I’ve had consistently comfortable, restful nights of sleep since it arrived. It feels well made, offers good pressure relief without being too soft, and I’m waking up feeling refreshed. Looking forward to seeing how it performs over the long term, but I’m very happy with my purchase so far."
"Horrible mattress, should not be name the one. This mattress is hard. Dont not buy unless you like sleeping on the floor. Have not had a good night sleep since I bought it. Just returned it. Body aches and headaches. And it’s so so expensive. I will try dream and if it’s not giving I will buy somewhere else. Not happy."
"Already has a dent in the middle. Within a week. Was hoping it was just it settling in. But no. I'm actually rolling up to the side of the bed as opposed to tolling over. Need to obtain a replacement."
"Im beyond thrilled with my new Casper,The One, which I ordered after seeing the review in Consumer Reports magazine. It's very comfortable and light enough to lift when making the bed."
"I love it. I was on an older mattress at our house in Cape Cod and my back was getting more sore every day. All resolved with my new Casper. The pillows are great also."
"Incredibly comfortable, Casper is just a reliable long lasting brand we have been happy with for 10+ years!"
"Great mattress. It was easy to set up. It's just a little too soft for my back. Otherwise it's great."
"Incredibly comfortable. We got two (King and Queen) for our guest rooms, and I find myself taking naps there instead of my own bed. Sleeps a little warm compared to some other mattresses, and the off-gassing was god awful for several days when we unpacked it. Not perfect, but compared to our more expensive master bedroom mattress I'd say it's 90% as good for less than half the price. And zero complaints from our guests so far!"
Feel the difference in person. Try products for yourself and chat with a Sleep Specialist at a store near you.
Our Sleep Specialists are dedicated to helping you find the mattress of your dreams. Give us a call or chat with us now.
Our Comparable Value prices reflect the price at which we or third parties have offered this item or a comparable item.
How does Casper create the best value products for their sleepers?Our team regularly searches the market and tests comparable mattress and sleep products to ensure that ours offer top-quality materials, the most value for your dollar, and the best sleep experience on the market.
Every Casper mattress is designed and assembled in the USA.
As part of the Carpenter Co family, Casper mattresses are manufactured by the largest foam manufacturer in the world—no middle man, no markups, just the best prices for our sleepers.
We don’t rely on gimmicks—just 12+ years of expertise.
With 12+ years in the mattress and bedding industry, the Casper team knows what makes a great night’s rest and what’s just fluff. Our mattresses and bedding are obsessively-engineered and precisely-layered to help you get your deepest sleep ever.
We don’t sleep on getting you the best possible deal.
The Comp. Value shown for Casper products is never set it and forget it. Our team conducts thorough market research every quarter to ensure our comparable value is always accurate to the bedding market and the three most comparable products, so you never have to worry about missing out on savings.
