?? USB PORT: It is very troublesome to go on a journey without a charged phone, which is why we have built-in a USB charging port in our design to offer you a more convenient way to charge your phone while walking, cycling, biking or traveling. Power banks are not included in this backpack and should be purchased separately. ?? COMFORTABLE & CONVENIENT: On the back side of the backpack you will find 2 mesh back panels with a multi-panel airflow to promote breathable comfortability on your back. The shoulder straps are designed with high elastic pads, which provides superior comfort and great support to help relieve stress from your shoulders when carrying a huge load. ?? MULTIPURPOSE: This lightweight backpack for men with USB charging port is designed to support all your outdoor adventures such as camping, motorcycle riding, fishing, mountaineering and much more. It also has anti-theft straps to keep your book bag tightly buckled on to your body and MOLLE webbing for attaching a variety of optional accessories. ?? LARGE CAPACITY-HIGH QUALITY & DURABLE MATERIAL:Features 2 front pockets, 1 front compartment, 1 main compartment, 1 interior pocket and 2 side pockets. The main compartment can carry up to 40L and with dimensions measuring at 50(height) x 35 (length) x 16 (width) cm. This Eco-Friendly bookbag is made with tear resistant and water-repellent Polyester fabric, which makes it suitable for outdoor activities and to carry personal items such as your iPad, Phone and any other electronic devices. ?? SATISFACTION GUARANTEE: We assure you that you will be completely satisfied with our Backpacks for Men, which is why we offer a 30-day satisfaction guarantee! If you are unsatisfied, simply contact us to return the product for a full refund.