Serta iComfort Memory Foam features zoned support from memory foam layers for contouring pressure-relief and breathability. With alternating levels of firmness, ergonomically design support zones in every Serta® mattress are designed to keep your body aligned as you sleep. CoolFeel™ Fabric keeps you comfortable throughout the night Our PerfectConform™ Memory Foam contours and cradles your pressure points for rejuvenating sleep Our 5 ZoneResponse™ Design provides head-to-toe comfort and support for restorative sleep CertiPUR-US(r) Certified