Protect your bed with a mattress pad that will also add provide comfort while you sleep. Our Down Alternative 100% Cotton Top - Added Thickness Mattress Pad is stuffed with 10 oz. of down alternative fill. That's 3 times the standard thickness of a mattress pad. With a 100% cotton top, you won't have to worry about rough material that will mess with your precious sleep. This Twin XL mattress pad has a deep 12" pocket to fit added depth mattresses and is machine washable for your convenience. Twin XL Bedding Mattress Pad Dimensions: 39" x 80" x 12" Manufactured direct from a trusted supplier.