Designed to pack down small, the 40-liter REI Co-op Duck's Back rain cover is a seam-sealed, waterproof shell to protect your pack and its contents from the rain. Features: Durable, silicone-coated ripstop polyester and taped seams. Drawcord offers 3 different cinching options for a secure fit on windy days Zippered nylon storage pouch features quick-drying mesh and doubles as an accessory pocket with a strap for easy transport Bottom panel resists abrasion and has a drain hole to release trapped moisture Pouch dimensions: 5.5 x 5.5 in. Weight: 4oz Dimensions: 21.5 x 13 x 11.75 inches Material: Polyester