Rains Trail Mountaineer Waterproof Backpack Sand Color 。Trail Mountaineer Bag is a functional and sporty design featuring a large main compartment, a padded laptop sleeve and multiple easy-access zip pockets. The sporty look continues with three side-mounted webbing straps, which can be adjusted to compress the bag, keeping contents in place. This waterproof bag also features a versatile elastic cord system for external storage, a mesh water bottle pocket plus padded back straps with adjustable chest strap for enhanced fit. 100% polyester with polyurethane coating Lining: 100% polyester Waterproof rating:W3 – Waterproof protection from light rain H18.5 x W11.6 x D7.1 inches Coated zip opening Single main compartment Zip pocket in top flap Mesh bottle pocket External back zip pocket Padded laptop pocket fits 16” device Side compression straps with buckles Bungee cord external storage Adjustable padded backstraps Webbing carry handle Adjustable chest strap This product is designed to withstand light to moderate weather conditions