Come and see our amazing products. Fashion style, exquisite craftsmanship, create convenient quality chest bag, technology and simplicity are combined into one, it is worthy of your rest assured purchase, your mobile storage manager.Made of water repellent nylon fabric, light-weight, No more aching neck, back & shoulders like with a backpack! Ergonomically designed, padded, breathable strap makes you forget you're even wearing this bag. External USB with built-in charging cable, Anti-theft design. The bag is equipped with professional pull head and anti-theft pull tail design to effectively ensure the safety of your items.And this bag does not include a battery, you need a power bank to charge it. It comes to an external earbuds jack as well.Bag design can be carried around, convenient and practical. Pls confirm with us about the packing info, stock color and exact production time before placing your order.