Come and Check Our Promo Solutions.The backpack is made of water-resistant microfiber leather and durable ballistic nylon materials. Dual carrying options. A padded side grab handle allows for carrying like a business bag. Shoulder straps allow for wearing as a backpack. With an external USB port and build-in cable connected with your power bank inside which will charge your phone more easily. (Power bank not included) Perfect for school, travel, business, daily use, and outdoor activities. Pls check inventory and detailed info with us before placing your orders.