The Max Cotton mattress cover is a 100% natural product amade of 100% cotton. This mattress cover is reversible. Can be used interchangeably on both sides and also incorporates a band with 100% cotton fabric. This mattress cover increases comfort by relieving pressure on the points of contact with our body and achieving a better rest thanks to its 100% cotton padding. The cotton padding acts as a thermal insulator reducing the sensation of heat. All Velfont mattress covers favor the circulation of air inside, eliminating the humidity that can accumulate and allow the correct perspiration. No refunds or exchanges allowed.