The upper surface fabric of liquid-proof hotel alezin is 20% polyester / 80% Cotton Flannel Fabric. The bottom surface of the liquid-proof hospital alezi is covered with a PU-based membrane that can absorb liquid-proof air. The 4 edges of our mattress protectors have elastic bands. It does not sweat like plastic coatings (PVC). It does not contain PVC-based carcinogenic substances. Suitable for unexpected situations. (Intense menstruation and postpartum bleeding) The bed is covered with liquid stains (blood, urine, sweat, etc.) protects against. It is ideal for the cleanliness and hygiene of your bed. The Mattress Protector prolongs the life of the mattress. It is used in hotels, all units of hospitals; operating rooms, intensive care, obstetrics, gynecology, children and all surgical units. It prevents the formation of mites and bacteria that cause Asthma, Eczema, and Allergic diseases. It is easy to use. It does not cause allergies. It does not require ironing, Does not slip,Prevents wrinkling of the sheet. Our waterproof alezes are guaranteed 120 washes at 90 degrees.