Olee Sleep 7,9,11 Inch Multi-Layered I-Gel Infused Memory Foam Mattress provides one of the most coolest night’s sleep around. Highly breathable gel infused memory foam improves warmth transfer and dissipation throughout the mattress. The result’s stunning: a continuously cool and dry sleeping surface that actively dissipates warmth. This mattress includes 3-4 different layers which can be I-Gel foam, high density(HD) convoluted foam, and high density(HD) foam. These kind of different materials work in combination to contour and conform on your body’s shape and movements, leading to a restful and rejuvenating night’s.