1. front and rear multi-layer storage, large-capacity and convenient storage at a glance, front zipper bag, side zero bag, multi-compartment main bag and shoulder strap card pocket large-capacity main bag, multi-compartment design of independent digital warehouse, designed for men to travel, multi-layer storage is readily available. 2. The bionic ergonomic shoulder strap is designed to be comfortable, breathable and not stuffy. The shoulder strap is designed with a honeycomb, which promotes the free circulation of air, keeps the back dry and hot, and effectively reduces sweating on the back. 3. Enjoy the scenery during long-distance travel. The tie rod fixing belt makes it easy for you to reduce the burden. The back tie rod fixing belt is designed, and it can be placed on the suitcase during long-distance travel to reduce the burden intimately. 4. External charging interface+earphone hole can also play while walking, and innovatively design the external charging interface of the built-in charging data cable of the backpack; You dont have to save electricity when you travel Mobile phones can continue to last when they are away from home; Please note that this backpack does not include the charging treasure itself, and the usb charging port only provides a convenient charging method. 5. The splash-proof fabric dries as soon as it meets water, and the surface is splash-proof and dustproof, which is easy to clean and provides all-weather protection for the contents of the bag.