Introducing the Helix Twilight Luxe 13.5" Firm Twin Mattress With Cooling, designed to provide exceptional support and comfort for a restful night's sleep. This grey mattress features a combination of memory foam comfort layers and an individually wrapped steel innerspring coil system, creating a perfect blend of support and pressure relief. Ideal for those who prefer a firm comfort level, this mattress also includes cooling technology to help regulate temperature throughout the night.