Casper
Casper One Mattress
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Display data last verified 2026-06-04. Floor displays can move while teams reset rooms; call ahead if you are driving in for one exact model.
Price matters, but comfort fit still decides the order. Review the current online offer, then ask the showroom to compare feel, height, support, base fit, and pickup, delivery, setup, and removal planning for this exact model and size.
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Casper One Mattress at Mattress Overstock
Casper One Mattress is a Casper mattress to compare for foam support, responsiveness, cooling feel, and whether the simplified comfort profile fits your room. The title gives you the starting point—the construction and comfort details in the product name—but the showroom test is where you learn whether it works for your shoulders, hips, lower back, partner movement, room height, and base setup.
What makes this mattress different
Over 10 Years of Refinement
Continuous improvements based on real customer feedback since the original Casper launch. Delivers tried-and-tested performance that suits a variety of sleepers and body types.
Cooler Sleep Experience
Breathable foam layers that encourage all-night airflow and combat overheating. Maintains a comfortable temperature reducing night sweats and mid-slumber wakeups.
Built to Last
Premium USA-made foams designed for endurance backed by a 10-year warranty.
Casper balances contouring, airflow, and easy movement
Casper tends to build a more neutral, easy-to-live-with feel than traditional slow memory foam. The brand mixes contouring foams with zoned support and breathable construction so the mattress does not feel overly dense or sticky.
The step-up models mainly change how much cooling hardware, pressure relief, and depth you get. That means the right Casper is less about brand loyalty and more about how warm you sleep and how much cushioning you want.
Compared with the Casper Dream, the Casper One is firmer and flatter than the Casper Dream. That is the practical difference you feel in the showroom: the medium-firm surface changes how deeply you settle in, while the underlying support build changes how easy it is to move and how steady the edge feels.
Shop all Casper mattresses →Built for the way you actually sleep
Combination sleepers - The feel is balanced enough to work for shoppers who rotate between side and back sleeping instead of committing to one position.
Couples - This middle-of-the-line tuning is usually the easiest compromise when two sleepers do not want the same thing from the surface.
Hot sleepers - Cooling details in the cover and upper layers help, but if temperature is your top issue, the hybrid or step-up cooling model is usually the smarter comparison.
Shoppers cross-shopping the lineup - If the Casper One feels either too flat or too plush in person, the closest adjustment is usually the Casper Dream.
Specifications
| Height | 11" |
|---|---|
| Feel | Medium-Firm |
| Firmness | 6 out of 10 (10 = firmest) |
| Construction | Breathe Flex Foam + Align Memory Foam + Casper Core Base + high-density support core |
| Cooling | Breathe Flex Foam A plush open-cell top layer for enhanced airflow and a cool night's rest. |
| Motion isolation | Excellent - layered foams absorb movement before it reaches the other side of the bed |
| Weight capacity | — |
| Adjustable base | Yes, compatible with adjustable bases |
| Certifications | CertiPUR-US certified foams |
| Warranty | 10-year limited warranty |
| Trial period | [100] days at Mattress Overstock |
Frequently asked questions
How firm is the Casper One?
We rate it 6 out of 10 (10 = firmest). In practical terms, that puts it in the medium-firm part of the lineup. The right fit depends on your sleeping position, body type, and whether you like to sleep more on top of the mattress or more in it.
How is the Casper One different from the Casper Dream?
The Casper One and the Casper Dream are close enough in the lineup that most shoppers should compare them side by side. The Casper One is the quieter, more motion-controlled choice, while the hybrid Casper Dream feels springier and cooler.
Does it work with an adjustable base?
Yes, compatible with adjustable bases.
How fast can I get it delivered in Kentucky?
We deliver with our own team across Kentucky. Most orders arrive the next business day when the size is in stock. Pickup is available at our Lexington, Georgetown, Somerset, London, and Richmond locations.
What if I do not like it after a few nights?
You have 100 days to make sure the comfort is right. We usually recommend giving any new mattress at least 21 nights before making a comfort decision, because covers and foams need time to settle and your body needs time to adjust.
Can I try it before I buy?
Yes. We have these models represented across our Kentucky showrooms, so you can lie down on the feel before you buy. Walk in, take your time, and compare it against the nearby step-up and step-down models.
Try it in person at any Kentucky showroom
Walk into any Mattress Overstock location, lie down, and feel the difference yourself. No appointment, no pressure. Our team has over 100 years of combined mattress experience and we're here to help you find the right fit.