Casper The One
Casper's The One is the all-foam favorite that suits most sleepers and ships straight to your door.
You save $500.00 at WG&R Furniture
Deal.ai's agents found this deal on November 8. The store may have changed its price since.
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Availability unknownSold by beltwaycommerce (100% positive, 44 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
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| Size | The One Mattress | Cloud One Mattress | Foundation | Mattress Protector |
|---|---|---|---|---|
| Twin | 38" x 75" x 11" | 38" x 75" x 11" | 37.5" x 74" x 7.5" | 39" x 75" |
| Twin XL | 38" x 80" x 11" | 38" x 80" x 11" | 37.5" x 79" x 7.5" | 39" x 80" |
| Full | 53" x 75" x 11" | 53" x 75" x 11" | 52.5" x 74" x 7.5" | 54" x 75" |
| Queen | 60" x 80" x 11" | 60" x 80" x 11" | 59.5" x 79" x 7.5" | 60" x 80" |
| King | 76" x 80" x 11" | 76" x 80" x 11" | 75.5" x 79" x 7.5" | 76" x 80" |
| Cal. King | 72" x 84" x 11" | 72" x 84" x 11" | 71.5" x 83" x 7.5" | 72" x 84" |
The One is Casper's all-foam mattress, built with a breathable polyurethane foam comfort layer over a firmer support core and wrapped in a soft knit cover. It comes in one firmness level, so it is aimed at shoppers who want a simple, medium-firm feel without picking a model tier. The best new price is $1,448.20 at Casper as of November 5, 2026, the only new price listed.
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Owner feedback on The One is generally positive on comfort and value, with most complaints about edge support and warmth.