TEMPUR-Flex Hybrid Supreme Medium Mattress 11.5-Inch thick medium soft mattress that pairs all the sleep-transforming benefits of temperature material with a New, dynamically responsive feel Designed with a dynamic support layer, made of innovative precision coils specially engineered to work in harmony with the temperature-response material layer to actively react to your bodys movement TEMPUR-Response material designed to precisely adapt to your body, giving you the adaptive support, pressure relief, and motion dispersal that only TEMPUR material delivers Designed with the innovative SmartClimate System created with a top layer of moisture-wicking fabric to draw moisture away while the inner layer provides cool-to-the-touch comfort Equipped with the EasyRefresh cover that zips off and on, so its simple to wash or replace