Oleo Sleep 7 inch memory foam mattress provides one of the coolest night’s sleep around. Highly breathable gel infused memory foam improves heat transfer and dissipation within the mattress. The result is stunning: a constantly cool and dry sleeping surface that actively dissipates heat. This mattress includes 3-4 different layers which are I-Gel foam, high density) convoluted foam, and high density) foam. All these different materials work together to contour and conform to your body's shape and movements, resulting in a restful and rejuvenating night’s.