The Picasso mattress has a Tencel zip on cover which is machine washable. The top layer is 3" of PureGel Plus Gel memory foam with Total Surface Coverage Gel providing total gel coverage for the foam to conform to the unique shape of the individual. Below that is a layer of 2" quick recovery convoluted foam which increases comfort and improves ventilation. The comfort support core is 7" of individually wrapped coils that provides extra support in the center and along the perimeter of the mattress. The bottom is 1" of durable and supportive high density polyurethane base foam. Tencel zip on and machine washable cover 3" of PureGel Plus Gel memory foam 2" of quick recovery convoluted foam (QRC) 7" of Comfort Support Core 1" of durable and supportive high density polyurethane base foam