The Peregrine Ultralight Pack Cover is a must have for keeping a pack and its contents dry in rainy conditions. The 30D Cordura UltraLite fabric delivers a desirable combination of qualities: durable, compact, lightweight, and waterproof. The Ultralight Pack Cover is made with dual waterproof treatments with a siliconized outside and a polyurethane coated inside. The bungee cord and keeper strap secure the cover completely over the backpack while the seamless construction eliminates the chance of water seeping through.