The Lysam Mattress Protector Twin XL is a noiseless, soft bed mattress cover made of breathable bamboo material, providing a comfortable and cooling experience for Twin XL size beds measuring 39x80 inches and fits mattresses up to 18" with 360 degree wrap around elastic. The waterproof feature ensures protection against spills and stains, making it easy to clean with machine wash instructions. This rectangular-shaped mattress protector in white color is designed by the brand Lysam, known for quality bedding products for the bedroom. This was part of a split king set, but only need one.