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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 1037.
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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
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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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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 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 Very well constructed. High 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)
Date published: 2026-07-23
Rated 5 out of 5 by from Very happy with it Very happy with it
Date published: 2026-07-18
Rated 5 out of 5 by from Really enjoy this mattress it Really enjoy this mattress it is the BEST i have ever had
Date published: 2026-07-17
Rated 5 out of 5 by from Very comfortable! Very comfortable!
Date published: 2026-07-15
Rated 5 out of 5 by from Light mattress, very comfortable, medium Light mattress, very comfortable, medium firm was just right - not too soft or hard, even for this side sleeper.
Date published: 2026-07-13
Rated 5 out of 5 by from Its awesome, some of the Its awesome, some of the best sleep of my life. If i sleep wrong it can affect my hips all week, and this mattress has caused me no problems
Date published: 2026-07-13
Rated 5 out of 5 by from The bed for Goldilocks! Not The bed for Goldilocks! Not too firm and not too soft, just right!
Date published: 2026-07-11
Rated 5 out of 5 by from Great mattress , everyone who Great mattress , everyone who stays over loves the matress
Date published: 2026-07-11
Rated 5 out of 5 by from The mattress is super comfortable. The mattress is super comfortable. I live it, but I also ordered the foundation because I had an existing frame. The mattress seems to dip slightly in the middle when on the foundation. I’m not loving that look.
Date published: 2026-07-11
Rated 5 out of 5 by from We love it! We love it!
Date published: 2026-07-09
Rated 5 out of 5 by from excellent mattress excellent mattress
Date published: 2026-07-09
Rated 5 out of 5 by from Wonderful replacement Wonderful replacement
Date published: 2026-07-07
Rated 5 out of 5 by from Our second purchase of this Our second purchase of this product. First was a queen 2 years ago. Still using it and loving it. Now the King for a second home. Equally pleased!
Date published: 2026-07-06
Rated 5 out of 5 by from Bought this for the guest Bought this for the guest room. Our son already owns one of these and should feel right at home when he visits.
Date published: 2026-07-03
Rated 5 out of 5 by from The mattress strikes a great 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.
Date published: 2026-07-03
Rated 5 out of 5 by from Most comfortable bed in the Most comfortable bed in the house!
Date published: 2026-07-02
Rated 5 out of 5 by from Very comfortable mattress! Easy to set up, and we are sleeping well on this mattress!
Date published: 2026-07-02
Rated 5 out of 5 by from My Wife Loves It! Although we had some reservations, the Casper Mattress proved to be an excellent product. Sleep has improved significantly.
Date published: 2026-07-02
Rated 5 out of 5 by from Love it. Feels too soft Love it. Feels too soft to the touch with your hand but feels amazing the first time you lie down on it. I'm mostly a side sleeper but I flip around a lot all night and I like that the vibrations don't affect the person next to me. I'm flipping around less now too
Date published: 2026-07-01
Rated 5 out of 5 by from Great night sleep from day Great night sleep from day one!
Date published: 2026-07-01
Rated 5 out of 5 by from Much better for my back Much better for my back than traditional mattresses!
Date published: 2026-07-01
Rated 5 out of 5 by from Excellent Excellent
Date published: 2026-06-30
Rated 5 out of 5 by from It's great!!! It's great!!!
Date published: 2026-06-30
Rated 5 out of 5 by from Very comfortable Very comfortable
Date published: 2026-06-30
Rated 5 out of 5 by from sleep like a baby, just sleep like a baby, just like my last casper purchase
Date published: 2026-06-30
Rated 5 out of 5 by from Casper is the best! Casper is the best!
Date published: 2026-06-28
Rated 5 out of 5 by from Love it. Like sleeping on Love it. Like sleeping on air!
Date published: 2026-06-26
Rated 5 out of 5 by from Love the mattress but do Love the mattress but do not like that after paying full price I was bombarded with ads for 20% off. Left me feeling taken advantage of.
Date published: 2026-06-26
Rated 5 out of 5 by from Best sleep I’ve had. Best sleep I’ve had.
Date published: 2026-06-26
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