This backpack is made of high quality PVC material, completely transparent, which enables you to quickly find what you need without rummaging, convenient and practical. Adjustable air cushioned straps ensure a comfortable carrying experience and reduce shoulder pressure. Size is 13'' L*5.9''W*16.5''H . The whole backpack is waterproof, which can effectively prevent tiny water droplets from penetrating into the interior and protect your belongings from accidental water damage.The backpack has a wide range of applicability, suitable for daily use, going through security check, sports events, concerts, airports, traveling, festivals and other various occasions, providing you with convenience.