Mens Backpack With USB Charger A backpack with a simple, elegant, and comfortable design, its size is very good, and it holds a lot of your things with USB charger Suitable for universities, schools, travel, and weekend hanging out Durable design: high-quality zipper, smooth and durable,.USB port, charge mobile phone anytime and anywhere Breathable mesh on back and shoulder straps supports air convection, ventilation and heat dissipation. The padding of the shoulder straps can relieve the back. Chest buckle design scientifically reduces back strain. A variety of wearing methods, you can wear it on your body or carry it in your hand