Come and Check Our Branding Solutions.This crossbody sling backpack comes with a usb charging port for charging electronic devices via connecting your own power bank. You can charge your devices hands free on the go. Made of waterproof material , 1 big pocket for laptop and inner pocket for other belongings. 2 side pockets for bottle or umbrella, 2 front zipper pocket for passport,ID card or other small things. Adjustable shoulder strap can be left and right altermately,convenient and practical. This shoulder sling backpack for men and women can be used as a sling chest pack, shoulder sling bag and sling backpack purse. Perfect for college, school, travel, sports. Customized is available. Pls check inventory and detailed info before placing your orders.