The Excelled Extra Firm Mattress from the Serta Perfect Sleeper X Quilted Hybrid collection is designed for exceptional support and durability. With an extra firm comfort level, its 5 ZoneActive Hybrid Design ensures full-body spinal alignment, while layers of graphite-infused memory foam provide cooling and pressure relief. Standing at 13.75", it fits deep pocket sheets and is CertiPUR-US certified, adjustable base compatible, and backed by a 10-year warranty. 100% USA-assembled, this mattress includes free delivery for your convenience!