Come and see our amazing products. Sling backpack made of sturdy anti-scratch oxford material. The whole bag weighs about only 0.253LBS, which is very lightweight and comfortable to carry. The metal zipper is also smooth and easy to pull.This chest bag with external USB charging port (power bank not included). The side hole is for earphone wire, you can enjoy music anytime, anywhere.Shoulder backpack perfectly works as small casual bag/ small daypack bag/ travel bag/ sling pack bag/ cross body bag. It sits nicely on your back/chest/shoulder and its shoulder strap is adjustable to meet different requirements for women and men. Pls confirm further with us if any query about packing info, inventory status and time schedule.