This luxurious mattress comes with a cool-touch deep quilted top cover, keeping the sleeper from overheating for a much more comfortable night’s sleep The mattress has been designed with a layer of next-generation Airstream memory fiber which shapes and adapts to the contours of your body which relieved pressure from building. It has similar properties to memory foam - but without the heat retention that some sleepers feel with memory foam. The core comfort of the mattress is a traditional 13.5 gauge open coil spring unit which allows the weight to be distributed evenly across the mattress providing extra comfort and support. The top panel and border of the mattress have been designed with a breathable fabric allowing the flow of air to pass through the mattress keeping it cool and refreshed. Symple Stuff Size: Double (4'6)