So you get the best bed, the best sleep to be at your very best. The 11" Hybrid Medium model combines the unique support of 970 Twin Support(r) individually wrapped coils for optimum spinal alignment with the cooling comfort of Gel Memory Foam as well as high-density Super Soft Support Foam. In addition, the Quantum Edge consists of double-wrapped coils at the head and foot of the mattress to deliver an edge-to-edge sleep surface. Edge-to-edge steel helps provide maximum airflow, adjustability and reduces roll-in/out. The top cover features a breathable soft knit designed to help regulate a cool and steady body temperature throughout the night. This 11" Scott Living Hybrid Medium mattress has just the right amount of comfort and support to ensure you can get a full night of restful, undisturbed sleep.