Fashion Sling Backpack with USB Charging Port, Chest Bag Crossbody Daypack Shoulder Bag for Men, Hiking, Cycling, Travel

【External USB Interface】 You can easily charge mobile phones, tablets, iPads and other devices without opening the backpack. Do you still feel burdened when you need to hold power bank to charge The sling bag brings you travel convenience and liberates your hands.We also included a USB data cable for iPhone & Android.

【Waterproof Material】 The shoulder bag is made of the latest Oxford fabric on the outside, and made of sturdy and durable polyester on the inside. Effectively prevent liquid from splashing into the backpack and soaking the contents of the bag. And this technology makes the backpack soft, stronger and stronger. Oxford fabric makes the sling bag version design clean and neat, full of fashionable texture.