The CF3000 Firm Euro Top mattress set by Serta iComfort Hybrid Quilted features Max Cold™ cover for an instant cool-to-the-touch sensation, the UltraCold System™ that absorbs excess heat from your body, Carbon Fiber Memory Foam that provide strength for back and neck support, a layer of iComfort® Gel Memory Foam that promotes cooling by increasing airflow, and the Deep ReactionTM Max Memory Foam that conform qualities for a firm yet comfortable deep-down support. This mattress also features the iComfort® Hybrid SupportTM System with BestEdge® Foam Encasement and Lumbar Support Core that works independently to conform to every curve of your body and provides durable support.