Upgrade your sleep with the Serta Perfect Sleeper Cobalt Calm Mattress. We designed our queen size Serta Perfect Sleeper mattress with a classic quilted 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 bottom of our mattress, we have Our upgraded innerspring system that delivers durable support. This Serta Perfect Sleeper has an extra firm feel and is perfect for front and back sleepers. At the top of our 12" mattress, we have our cooling mattress cover that keeps you feeling fresh all night long. Beneath that is our PillowSoft Aire memory foam that delivers both comfort and cool breathability. Next is our cooling gel memory foam provides even more cooling and comfort. In addition to our cooling foam, we have our support foam to help relieve pressure points. Buy an innerspring mattress online today. | Serta Perfect Sleeper Cobalt Calm Queen Mattress - Innerspring | Extra Firm