Serta iSeries Hybrid NXG 3500 Firm

The Serta iSeries NXG Hybrid lineup is a collection we're really excited for. Featuring the tried and true high-density NXG Memory Foam, these mattresses have an amazing feel and offer phenomenal pressure relief and durability. Serta Support Foam, and Serta's Zoned Support System with Micro Coils promote even weight distribution and boosted pressure relief so your shoulders and hips get the comfort they need and your back gets the support to help you wake up feeling great. CoolFeel Plus System, featuring Carbon Fiber Memory Foam, offers increased cooling by drawing heat away from the body for all-night comfort. Features Cushion Firm Feel MaxCold Cover Phase Change Material Carbon Fiber Memory Foam (3.6lb density) DeepReaction Max Memory Foam (6.3lb density) NXG Memory Foam. (5lb density) Micro Coil Layer 5 Zone 1000 Density Wrapped Coils Available Split-Head Options 10 Year Warranty