Durable 600-denier polyester is coated for waterproof protection; Waterproof construction featuring Tarpaulin fabrics that are extra resistant and 100% waterproof, inspired by canvas polyurethane coating; Made of strong Ripstop fabrics, that avoid tear and abrasion that may cause premature wear; Form-fitting shoulder straps, a sternum strap and back panel padding make for comfortable hands-free carrying