The Serta Perfect Sleeper Cobalt Calm Mattress delivers the cool, comfortable sleep you've been dreaming of. We designed our king size Serta Perfect Sleeper mattress with a classic quilted pillow top and an 850-coil density system that delivers zoned comfort and pressure relief. This upgraded model comes with antimicrobial protection, a cooling mattress cover and cooling gel memory foam layers. At the top of our 14.5" mattress, we have our cooling mattress cover that keeps feeling refreshed. Our PillowSoft Aire memory foam allows for airflow to prevent heat & moisture buildup. Our cooling gel memory foam provides cooling comfort while our support foam relieves pressure points and tension. Our upgraded innerspring system delivers long-lasting support all night long. This Serta Perfect Sleeper has a medium pillow top feel and is fit for all types of sleepers. Purchase an innerspring mattress today. | Serta Perfect Sleeper Cobalt Calm King Mattress - Innerspring | Medium Pillow Top