This super soft cotton flat mattress protector is 100% waterproof, extra absorbent and breathable. Use as a waterproof protector for the mattress, laid flat on the mattress and underneath the sheet. Machine washable (up to 60 degrees) and tumble dryer safe (low heat). Longer-Lasting Mattress ? Our mattress protector helps keep your mattress clean and dry for longer, meaning that it will last for many years to come. Breathable & Anti-Dust Mite - Each protector is flat not fitted, allowing the mattress to breathe from the sides and underneath, whilst also providing flexibility when positioning the protector where your baby is lying. It also creates a barrier against dust mites. Super Soft - No more crinkly, plastic mattress protectors! We use super soft organically grown cotton that is free of pesticides and herbicides, and creates a comfy soft support for your baby. 100% Waterproof - We use a safe food grade polyurethane (the same that is used in babies bottles and dummies) sandwiched in between two layers of luxury cotton to create a completely waterproof protector. Extra Absorbent - Unlike plastic coated protectors, the layers of cotton absorb moisture and wetness, preventing any liquid from pooling or running on the surface to help keep your baby clean and dry. OEKO-TEX Certified - Our manufacturing processes are OKO-Tex certified, guaranteeing they are safe and free of harmful toxins.