✔Zipper closure ✔【Structure Features】a long crossbody adjustable strap,smooth zipper.Roomy compartment to organize your cellphone, tablet, wallet, keys, ID card, credit card. ✔【USB CHARGING PORT】Great convenience for charging your electronic devices via connecting your own power bank , you can easily and conveniently charge your phone, tablet and other devices without opening up the backpack. ✔【 EXCELLENT DESIGN & STYLISH 】- We wanted to make the casual daypack practical enough but at the same time very trendy. This backpack is perfect with a taste for unique luxury and high quality craftsmanship.