Cotton 4 pillow mattress liquid proof 50x70 upper surface material: 80% cotton - 20% polyester bottom surface material: 100% polyurethane membrane (liquid proof fabric) usage areas and properties: it prevents the formation of sweat. the upper surface is soft fabric, the lower surface is laminated with a protective pu membrane. it has air permeability thanks to micro pores. it is useful for long-term inpatients. instructions for use: it should be washed at maximum 60 degrees. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.