Hilding mattress protector is a 100% cotton, highly flexible, breathable and waterproof mattress protector that guarantees maximum comfort and protection. Natural cotton fibers create an optimal sleeping climate, ensuring a comfortable and healthy sleep. resistant to stains, bacteria, fungi and unpleasant odors top layer made of elastic, 100% cotton bottom layer covered with a protective PU membrane noiseless, crease-resistant material attached to the mattress on elastic, like sheets, suitable for mattresses up to 30 cm high