The valuepac visco is 16cm thick with 25cm visco elastic memory foam and 135cm of high density support foam the temperature sensitive slow recovery memory foam contours to your body shape which ensures the best possible sleep 12 month guarantee 25cm visco elastic memory foam 135cm high density support foam removable washable cover contours to your body to give excellent support lightweight amp easy to handle promotes good blood circulation hypo allergenic perfect for asthma sufferers