MediChoice Foam Mattress Overlays add a 3-inch layer of comfort to your mattress. The overlay is designed to distribute body weight evenly over its surface and promote air circulation, thanks to its convoluted eggcrate design. The overlays are made in America and provide long-lasting value. The product is available in multiple sizes and meets flammability standard TB117. *** Please note we DO NOT accept opened product returns.  Any unopened and undamaged items purchased through Amazon can be returned within 30 days of the shipping date.  Please see our return policy for additional details. ***