water-proof sling bag/crossbody backpack/shoulder bag with usb charging port for travel, hiking, cycling, camping

implant usb cable. you may charge your mobile phone easily with the usb charing port (using the implanted usb cable connect your potable power supply). a mobile phone pocket in shoulder strap makes you convenient for charging and listening while walking. made of a lightweight, water repellent polyester with quality zippers, suitable for travel, hiking, cycling, camping, mountaineering, school and other purpose wear this sling bag over either shoulder with reversible shoulder strap, or in the front to deter thieves. reflective tape - reflective detailing in the bottom of the big pocket for safety for late night using.syi