I'm selling this because I accidentally bought the wrong size. It's a white, waterproof box spring sheet. - Color: White - Waterproof function: Yes - Size: Wide King 200x200 - Surface fabric: Fiber fabric - Backing: TPU waterproof membrane - Side fabric: Polyester [Product Features] Great for various situations, such as for women during menstruation, for children's spit-up or bedwetting, for pets' accidents, for elderly care, and for those prone to allergies! It has all-around elastic, so it won't slip even when you toss and turn, securely fixing the mattress, and it's super easy to put on and take off! It can be used year-round and makes no crinkling sounds. You can sleep well every night! The side gussets are not completely waterproof to prevent water from pooling and to allow the sheets to dry easily.