The sheet is fabric on the top and has a waterproof and breathable polyurethane membrane on the bottom. It is ideal for standard baby mattresses measuring 120x60cm and up to 15cm thick. It protects the surface of the mattress from getting wet and dirty. Thanks to an elastic band sewn at the end, it adheres to the surface of the mattress. The soft and delicate terry fabric does not irritate the child's skin. You can wash it at 95°C.