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Casper The One All Foam Full Size Mattress

MODEL:

CASPRONE-F

MPN:

950000151003
4.9 out of 5 Customer Rating
Casper The One All Foam Full Size Mattress is rated 4.5 out of 5 by 1076.
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Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires Casper The One All Foam Full Size Mattress, , hires
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90 Night Sleep Guarantee
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Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires Casper The One All Foam Full Size Mattress, , hires
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Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires Casper The One All Foam Full Size Mattress, , hires
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Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires Casper The One All Foam Full Size Mattress, , hires
Click on image to Zoom
Casper The One All Foam Full Size Mattress, , hires
Casper The One All Foam Full Size Mattress, , hires Casper The One All Foam Full Size Mattress, , hires
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Key Features

  • Type: All Foam
  • Size: Full
  • Comfort Level: Firm
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90 Night Sleep Guarantee If you are dissatisfied with the comfort of your mattress, you can exchange or change it. Learn More! If you are dissatisfied with the comfort of your mattress, you can exchange or change it. Learn More!

90 Night Sleep Guarantee If you are dissatisfied with the comfort of your mattress, you can exchange or change it. Learn More! If you are dissatisfied with the comfort of your mattress, you can exchange or change it. Learn More!

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About this Item

Casper The One Mattress

The One is Casper's expertly engineered all-foam mattress, built with three layers of cradling foam to deliver a responsive, medium-firm feel that makes quality sleep accessible without breaking the bank.

Banner stating 'Don't just take our word for it. Casper mattresses are highly ranked by Consumer Reports.' Includes a 'Read the report' button and a disclaimer note.
Casper One foam mattress on a white metal bed frame with striped and round pillows, styled in a modern bedroom.
What if better sleep didn't have to cost more?

The One is Casper's signature affordable foam mattress, featuring three thoughtfully engineered foam layers that work together to cradle your body, relieve pressure, and support restful sleep night after night. Its medium-firm feel strikes the balance between plush comfort and dependable support --- delivering the kind of sleep experience typically reserved for higher-priced mattresses.

Backed by a 90-Night Sleep Trial, The One lets you experience the difference Casper's foam engineering makes --- completely risk-free.

Who Is The One For?

The One is an ideal match for back sleepers and side sleepers who need balanced pressure relief and spinal alignment without paying a premium price. Its foam construction contours closely to the body, making it especially well-suited for combination sleepers who shift positions during the night and want consistent comfort throughout. Budget-conscious shoppers who don't want to compromise on sleep quality will find The One a dependable, long-lasting solution.

Pressure Relief & Body Contouring

The One's comfort foam layers conform closely to the body's curves, gently cradling pressure points at the shoulders and hips. This targeted contouring helps reduce aches and pains, particularly for side and back sleepers who need extra cushioning at key contact areas throughout the night.

Motion Isolation

The foam construction of The One absorbs and dampens motion transfer naturally, preventing disturbances from traveling across the mattress surface. This makes it a great choice for couples or light sleepers who need to stay undisturbed even when a partner shifts positions or gets in and out of bed.

Responsive, Medium-Firm Support

The One's three-layer foam system delivers a medium-firm feel that provides responsive pushback to keep your spine properly aligned while you sleep. The supportive base foam ensures the mattress holds its shape over time, maintaining consistent comfort for a wide range of body types and sleep styles.

Three Layers of Foam, Engineered for Better Sleep

The One is built from the ground up with three distinct foam layers, each designed to serve a specific purpose in delivering comfortable, supported sleep. From the durable base that anchors the mattress to the breathable comfort layer on top, every inch is thoughtfully constructed to balance softness and structure.

  • Durable Foam Base --- stays supportive year after year, maintaining the mattress's shape and preventing sagging over time
  • Cradling Memory Foam --- keeps you aligned and asleep by contouring to your body and supporting proper spinal position
  • Breathable Comfort Layer --- helps you get cozy from the moment you lie down, softening the surface for a welcoming feel
  • Medium-Firm Feel --- a universally comfortable firmness level designed to suit back, side, and combination sleepers
Diagram of the Casper One mattress layers: breathable comfort layer, cradling memory foam for alignment, and durable foam base for long-term support.
What Makes The One Different?

Casper designed The One to prove that sleep science and affordability aren't mutually exclusive. Rather than cutting corners to hit a lower price point, The One is engineered with the same design principles behind Casper's more premium mattresses --- delivering meaningful comfort features in a streamlined, all-foam format that genuinely performs.

  • 90-Night Sleep Trial: The One comes backed by Casper's 90-Night Sleep Trial, giving you three full months to decide if it's the right mattress for you --- with a hassle-free return if it isn't.
  • Casper's Signature Foam Engineering: Built using Casper's established foam-layering approach, The One benefits from years of sleep research and material refinement --- giving shoppers access to proven construction at an accessible price.
  • Designed and Assembled in America: Like all Casper mattresses, The One is designed and assembled in the United States, reflecting Casper's commitment to quality control and domestic craftsmanship.
  • 10-Year Limited Warranty: The One is protected by a 10-year limited manufacturer warranty, ensuring your investment in better sleep is covered for the long haul.
PDF Icon Ratings & Reviews
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Product Height
12 Inches
Product Width
54 Inches
Product Depth
75 Inches
Product Weight (lbs.)
63 Lb(s)
Collection
Foam
Series
The One
Type
All Foam
Size
Full
Coil Type
Coil Type Not Available
Coil Count
-
Comfort Level
Firm
Comfort Number
2
Construction
Tight Top
Edge Support
Yes
Cooling Technology
No
Hypoallergenic
Yes
Removable Cover
Yes
Adjustable Base Compatible
Yes
Additional Features
As comfortable as it is affordable. Our all-in-one solution for better sleep. Signature all foam mattress designed with a responsive yet supportive medium-firm feel is perfect for any sleep style.
Motion Isolation
-
Warranty Terms - Parts
120 Month(s)
Warranty Terms - Labor
120 Month(s)
Rated 5 out of 5 by from Great mattress Great mattress
Date published: 2026-09-03
Rated 5 out of 5 by from So far so good So far so good
Date published: 2026-09-03
Rated 5 out of 5 by from Mattress was very comfortable and Mattress was very comfortable and supporting. Well rated by CR now see why.
Date published: 2026-09-02
Rated 5 out of 5 by from Love my new mattress. Sleeping Love my new mattress. Sleeping better than ever.
Date published: 2026-09-02
Rated 5 out of 5 by from Great Bed I've been extremely pleased with the comfort of this bed. It originally was to go in the guest room, but I may not give it up.
Date published: 2026-09-01
Rated 5 out of 5 by from Pretty incredible. Not sure what Pretty incredible. Not sure what else to say - it is soft but also provides structure in the way that a firm mattress does.
Date published: 2026-09-01
Rated 5 out of 5 by from Maybe this really is the one. So far it's been really great. Very comfortable, restful sleep without overheating.
Date published: 2026-08-28
Rated 5 out of 5 by from Everyone loves it Everyone loves it
Date published: 2026-08-25
Rated 5 out of 5 by from It’s my second Casper mattress. It’s my second Casper mattress. Great nice sleep with no pressure spots anywhere upon awakening
Date published: 2026-08-24
Rated 5 out of 5 by from I have now purchase 3 I have now purchase 3 "The One" mattresses in three different mattress sizes (twin, full, and queen). I'm a side sleeper and this style mattress really works for me. I have lower back and shoulder discomfort from arthritis and The One allows me to sleep through the night with the right amount of support and feel refreshed when I get up. Other mattresses that I'm exposed too from places like hotels or visiting family usually causes back or shoulder pain when I wake up. So I'm sold on The One mattress. It's worth giving it a try.
Date published: 2026-08-22
Rated 5 out of 5 by from We had a great first We had a great first week of sleeping on our new mattress. As comfortable as the first one we bought many years ago.
Date published: 2026-08-20
Rated 5 out of 5 by from Comfortable right firmness my husband Comfortable right firmness my husband even snores less
Date published: 2026-08-20
Rated 5 out of 5 by from Very comfortable mattress. I love Very comfortable mattress. I love it.
Date published: 2026-08-19
Rated 5 out of 5 by from Really pleased ! Really pleased !
Date published: 2026-08-19
Rated 5 out of 5 by from Very happy with the bed Very happy with the bed
Date published: 2026-08-18
Rated 5 out of 5 by from Just the mattress I needed My old foam hybrid was sagging and I was tossing and turning. The One gave a firmer but forgiving sleep position. Been sleeping much better.
Date published: 2026-08-16
Rated 5 out of 5 by from Incredibly comfortable, Casper is just Incredibly comfortable, Casper is just a reliable long lasting brand we have been happy with for 10+ years!
Date published: 2026-08-15
Rated 5 out of 5 by from Great mattress and reasonable priced Great mattress and reasonable priced
Date published: 2026-08-14
Rated 5 out of 5 by from The best. The best.
Date published: 2026-08-14
Rated 5 out of 5 by from We love it - it's We love it - it's the perfect balance between firmness and cradling your body.
Date published: 2026-08-12
Rated 5 out of 5 by from Surprisingly firm and supportive. Expanded Surprisingly firm and supportive. Expanded to full size quickly. Very well made.
Date published: 2026-08-09
Rated 5 out of 5 by from Im beyond thrilled with my 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.
Date published: 2026-08-06
Rated 5 out of 5 by from Best, most comfortable mattress The single bed mattress from Casper was so comfortable that the entire family wanted to move into the guest room so they could use it!
Date published: 2026-08-04
Rated 5 out of 5 by from I love it. I was 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.
Date published: 2026-07-29
Rated 5 out of 5 by from Love it! Perfect balance of Love it! Perfect balance of support and comfort.
Date published: 2026-07-28
Rated 5 out of 5 by from Best mattress and Amazing sleep! Best mattress and Amazing sleep!
Date published: 2026-07-28
Rated 5 out of 5 by from Firm but comfortable. Gives good Firm but comfortable. Gives good support.
Date published: 2026-07-27
Rated 5 out of 5 by from Just what we needed. Just what we needed.
Date published: 2026-07-26
Rated 5 out of 5 by from Lovely, soft bamboo sheets at Lovely, soft bamboo sheets at a great value! Highly recommend.
Date published: 2026-07-23
Rated 5 out of 5 by from Perfect for twin bed Bought for guest room day bed. Was very comfortable. Guests happy.
Date published: 2026-07-23
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