Snug Soft Deluxe Mattress Pad (1'' pile/40 oz ) Snug Soft is our machine washable line with 2 corner straps. The wool is knitted through a durable poly backing that allows the added convenience of machine washing. This makes them perfect for infants, children and the elderly. Three distinct pile heights offering all the benefits of pure wool comfort. Wash in cold water and machine dry-low or line dry. The Deluxe, Imperial, and Elite have wool fibers knitted through a woven polyester machine washable backing. Twin size is 39" x 75". Twin XL is 39" x 80". 1 pile height/washable backing/2 corner straps Machine wash cold, tumble-dry low.