Protect your mattress and keep things hygienic with Naturepedic's Organic Waterproof Mattress Protector. Our waterproof mattress protector is made with two layers of soft organic cotton jersey on the top and bottom and an ultra-thin waterproof barrier in the center. Its versatile design fits mattress depths from 9" to 16". With an organic cotton skirt and full elastic perimeter, it fits nearly all bed sizes. While most mattress protectors use questionable waterproofing materials like vinyl/PVC, phthalates and butane rubber, we have found a safer way to protect your mattress. This organic waterproof mattress protector features our proprietary DrySleep™ Technology, which blocks liquids from passing through while allowing water vapor to escape. This helps reduce sweating and clamminess, providing comfier sleep and complete waterproof protection. Our organic waterproof mattress protector also helps block dust mites and pet dander from penetrating through to the mattress surface. Say goodbye to bedtime allergens and hello to a cleaner, better night's sleep. Machine wash and dry.