Spa Sensations 2-in-1 Cool Cradle Firm Support Topper: * Ideal for back sleepers * Poly mesh pique cover for ventilated distribution of heat * Made of temperature sensitive visco-elastic foam * Responds to body heat and molds itself for a custom surface * 1" premium quality memory foam and 1" latex-like foam * Washable cover * Twin size measures: 37" x 73" * Twin XL size measures: 78"L x 37"W * Full size measures: 52" x 73" * Queen size measures: 58" x 78" * King size measures: 74" x 78"