With USB Charging Port】USB interface design, great convenience for charging your electronic devices via connecting your own power bank, so this USB backpack offers you a more convenient way to charge your phone while traveling. 【With Trolley Sleeve & Anti-theft Pocket】A trolley sleeve on the back allows the travel backpack to attaches to the handle of a carry-on luggage for hands-free transport, easier carrying. With a hidden anti theft pocket on the back protect your valuable items from thieves. 【Independent Shoe Compartment & Wet Bag】One shoe compartment on the bottom of School backpack carry on to keep the shoes separate and everything else clean. two venting hole in shoe compartment, make it keep breathable to not smelly. The front Wet bag of the flight approved waterproof travel backpack with high-density waterproof material can help you to separate dry items from wet items like wet clothes or towels 【Adjustable Breathable Shoulder Straps】The laptop backpack’s robust padded straps and back panel for walking stable and comfortable. A removable sternum strap that connected its two shoulder straps, as well as an air-mesh ventilated back panel that helped minimize back sweat. All specs in provided photos thanks bunches for looking!