Rio Home Fashions MFM-SY01-9TXL TataME Bed Memory Foam Mattress & Topper, Twin X-Large, White Mattress/ mattress topper: 5 inch thick better support than 3 or 4 inch topper Reversible: ultra plush side and firm side topper can also be used as daybed futon or floor mattress Stay cool, sleep well: with cooling gel-infused memory foam and ventilation, youll wake fresh as a Daisy! Ergonomically designed: get a better nights sleep and improve your posture with balanced support