The Sleep and Beyond Organic Cotton Waterproof Mattress Protector is GOTS, Fair Trade and Oeko-Tex certified. It is lightweight, easy to change, and can accommodate mattresses up to 18 inches. Made from two layers of soft 100% organic cotton jersey fabric with Sleep and Beyond’s proprietary waterproof TPU coating in between. This protector is 100% waterproof on the top and sides, it protects against spills, stains, dust mites, and other bacteria. It is free of vinyl/PVC, VOC’s, phthalates and other carcinogenic chemicals. There are no PBDEs, Flame Retardants, Dyes or Biocides.