The 12’’ iSeries NXG 1500 Luxury Firm mattress by Serta® delivers the next generation of comfort with a firm feel ideal for back and stomach sleepers. Designed with wellness in mind, this mattress helps promote healthy spinal alignment, reduces tossing and turning, and supports more restorative sleep. NXG™ Memory Foam provides deep, contouring pressure relief, while Carbon Fiber Memory Foam reinforces support and channels heat away from the body for cooler rest. A dense foam core with Ultimate Edge® Support enhances durability and stability across the entire surface. The cool-to-the-touch MaxCold™ cover offers immediate cooling the moment you lie down, creating a refreshing sleep environment. Mattress protector recommended. Compatible with most adjustable bases.