Large Capacity & Multi-pocket: Duo-bag,one has 2 pockets for laptop(under 17 inch) and pad(15.5 inch), inner shockproof belt for fastening your laptop and Pad, preventing them from sliding and bumping. One has 2 elastic mesh pockets and open pocket for daily stuffs. Hold your belongs organized and easier to find. | USB Hub: Removable USB charging line, connect power bank and electronic devices while walking. Please note that this backpack doesn't power itself, USB charging port only offers an easy access to charge. When clean backpack, remove the USB charging line. | Comfy & Breathable: Adjustable shoulder straps and breathable sponge mesh design, reduces stress. Foam-padded top handle for a long time carry on. | Water-proof: Waterproof and durable Nylon fabric with metal zippers. Ultra-weight and sturdy, ensure a secure & long-lasting use daily. Perfect for weekend getaways, shopping, office work, business traveling and other outdoor activities. Also, it is a perfect student’s backpack for women, men, teens, boys and girls. | Anti-theft: can be attached to the suitcase, over the luggage upright handle tube for easier carrying. A zipped anti-theft pocket located on the lower back keeps your phone, wallet, passport, and other valuable items safe and handy.