iSeries NXG - 12.5" Memory Foam Plush Mattress 2500We've evolved the Serta iSeries NXG to be the next generation of comfort. We've built this Plush feel mattress with a series of benefits for the sleep you want. Experience immediate cooling, instant pressure relief, and ideal support for a deeper, more restful sleep at a price that makes sense. Featuring high density memory foam, NXG Memory Foam delivers deep, contouring pressure relief. A cool to the touch fabric oers instant cooling, while Carbon