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.
What makes this mattress The One?
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.
Measurements & Dimensions
Twin 38″ W x 75″ L x 11″ H 47 lbs Twin XL 38″ W x 80″ L x 11″ H 50 lbs Full 53″ W x 75″ L x 11″ H 64 lbs Queen 60″ W x 80″ L x 11″ H 76 lbs King 76″ W x 80″ L x 11″ H 94 lbs California King 72″ W x 84″ L x 11″ H 93 lbs Split King 76″ W x 80″ L x 11″ H 100 lbs
Materials & Certifications
Top layer of breathable polyurethane foam Second layer of memory foam Durable base of polyurethane foam Patents: https://casper.com/pages/patent
Warranty, Shipping, & Returns
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.
Disclaimers
* 92% of Casper customers keep their mattress based on a 12-month cohort of customers who purchased between May 2025-Apr 2026.
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