Waterproof Lyocell from Eucalyptus Tencel Jacquard Mattress Pad, Twin Extra Long Size 39"x80" Polyester 60% Lyocell from Eucalyptus ,40% polyester. Waterproof Super Soft and cool to the touch Sizes: Twin XL measures 39 inches by 80 inches. Full size measures 54 inches by 76 inches. Queen size measures 60 inches by 80 inches. King size measures 78 inches by 80 inches. California King measures 72 inches by 84 inches. Fits Mattress up to 15" deep. Elastic band all around to keep it firm on bed like Fitted sheet Machine wash in cold water