Come and Check Our Branding Solutions.Our sling backpack offers a large capacity for your needs, lightweight and portable. External USB with built-in charging cable. You can easily and conveniently charge your phone, tablet, and other devices without opening up the backpack. Water resistent, rest assured your belongings are dry and fresh even on rainy days. It is great for multiple purposes, like daily use, daddy bag, shopping, walking a dog, school, a boy scout camping trip, gym, biking, short hike, a day at the amusement park or going to the gym. And use this daypack as a carry-on for hiking, travel, camping, fishing, mountaineering, backpacking, climbing, etc. Delicate workmanship, bringing you excellent using experience. Pls check inventory and detailed info before placing your orders.