Serta Spectrum 10"Serta Spectrum 10" The Serta Spectrum 10 Plush Mattress is the comfort you expect of a Serta Mattress conveniently packaged and designed for easy transport. 2 DuraCool Gel Memory Foam Premium breathable memory foam infused with gel for a luxurious feel that helps provide pressure point relief while promoting airflow and reducing heat build up for a more comfortable sleep. 2 ComfortAir Foam Highly breathable comfort foam that helps create a plush feel