Sea to Summit Pack Cover - The Pack Cover is a lightweight 70D Nylon that offers a great combination of durability and low weight. It's been contoured nicely to fit most hiking packs and stores into a compact stuff sack when not in use. Features Made of 70D polyurethane-coated nylon Contoured for modern packs All seams are tape sealed Compact packed size Fits to 30L pack Weight: 3.5oz