Sleeptrue Firm 11" King Hybrid Mattress in a Box, Cooling, Breathable, and Pressure Relieving - 100 Night Trial, Certipur-Us Certified and 10 Year Limited Warranty

Designed with cooling gel memory foam, this mattress seamlessly blends value and convenience with the durability and trusted comfort Serta is known for. This collection offers all-foam and hybrid designs with 3 zones for lower back support* and breathable fabric, so you wake up refreshed. This Serta Mattress-in-a-Box collection delivers comfort at a value with convenient delivery—so you can rest easy night after night. *Only available in select Serta models