Sling Crossbody Backpack Usb Anti-theft Purse Mens Shoulder Chest Bag Travel CollegeLightweigh - The sling chest bag size is 20cm/ 7.8in*13cm/ 5.1in* 36cm/ 14.17in .Can free your hands, and still having instant access to travel essentials (wallet, passport, headphones,Phone,keys etc). Anti-theft Lock - customs lock can protect your items safe.There is a hidden anti-theft bag on the back to protect your valuables from thieves. Freedom your hands from crowds. USB Charging Port& Adjustable Shoulder Strap - This sling chest bag with external USB port allows you to charge your phone at anywhere and anytime.Strap length also can be adjusted. Convenient - You can have 3 carrying options (Single shoulder, cross body and hand carry). Card Pocket on Strap make you get to your card conveniently when you need it. Ergonomic design - Comfortable Lightweight body with unique padded back design,ensures the dispersion of gravity throughout the sling bag.A heat-dissipating material design making it comfortable to wear even when loaded with your gear.Lock buckles in strap allow you adjust the shoulder strap position and relieve shoulder pressure.