10cm memory foam layer, deluxe depth for superior comfort levels and pressure relief. The ultimate performance in sleep technology using Outlast smart fabrics. A natural thermostat that controls temperature within the mattress surface & body. Developed from the space programme to cope with huge temperature swings within space suits it is now available for use in exclusive high performance sports & ski wear. The thermocules have also been introduced into fabric for use in high specification bedding products & is especially well balanced with Memory foam products. The smart fabrics work to store excess heat from the body & releasing it when required to maintain the perfect body temperature. Each person can have their very own micro climate which will lead to deep restful sleep. All Outlast covers are quilted with a luxury soft feel fabric & are removable for easy 40 degree washing to refresh your mattress whenever you want. Spare covers are available for purchase.