Made from durable, waterproof, urethane coated 1.9 oz. Ripstop Nylon. Provides protection for most large to extra large packs. Adjustable elastic cord draws through the perimeter of the packcover with a velcro closure. Packaged in a reusable mesh bag. Fits packs: External- 4,000 to 6,500 cu.in., Internal: 3,500 to 5,500 cu.in., Day Pack: 1,800 to 3,500 cu.in. Weight: external- 6.2 oz., internal- 5.2 oz., Day- 3.9 oz. Made in USA.