Protects and extends the life of the mattress. Will not crack, peel or discolor. Contoured-style slips easily over mattress. Hypoallergenic. Waterproof. Machine washable. Fits Bed Size: 39" x 75" 8". 554-8069-1950 - Protective Mattress Cover for Home Beds, Zippered Plastic, Twin - 1 Each.