BOPAI Waterproof Nylon Large Capacity Anti-theft Laptop Backpack with USB Charging Port (Black) PREMIUM MATERIAL: This stylish attractive backpack is made of water-resistant microfiber leather and durable ballistic Nylon material. The metal fittings, sliders, zippers, pullers used are durable and of . STORAGE CAPACITY & USB FEATURE : Total capacity :13 litres Dimensions: (L) 29 x (W) 11 x (H) 43 cm. Weight: 1.32 Kg. External USB port with built-in charging cable enables convenient charging by connecting your power bank with your electronic devices. ORGANIZED DESIGN : Soft padded compartment protects up to a 15.6 inch laptop. Comes with an organiser to store pens, charger, powerbank etc. Keychain holder for keys. The compartments are spacious enough for storing office and Laptop accessories. Two side pockets for waterbottle, folding umbrella etc. INVISIBLE ANTI- THEFT DESIGN&TROLLEY STRAP : The insertible pull rod box design allows the bag to slide over the luggage handle for easy mobility during traveling. : One hidden zipper pocket equips on the back to pack your wallet, money, cards. This invisible design increases the security of your bag. COMFORTABLE TO CARRY : The Bag is made with Physiological Back Design for special care of backbone. Ergonomic design of adjustable Anti-pressure elastic shoulder straps reduces stress and also promotes air circulation.