The Back on Track Mattress Overlay is suitable for all those who generally have tension in the body or in their back. Many users find that they have a deeper sleep and wake up the next morning feeling refreshed due to the revolutionary Welltex Ceramic Fabric. Available in white with a beige rim and in following dimensions: 35"x78", 47" x78", 55" x 78", 62" x 78", 70" x 78".