1. Travel Backpack: Convenient for security checks, backpack design, holds up to an 18-inch laptop, can be opened freely 90 to 180 degrees, safe and quick opening at the airport to ensure a smooth flight. Designed for air travel. Can be used as a men's travel backpack or spacious university backpack, professional laptop backpack. Single international travel, overnight camping backpack, hiking backpacks, with large capacity USB rechargeable backpacks. 2. Security Protected Backpack: The back is designed with anti-theft pockets to protect your valuables from theft, such as mobile phones, passports, bank cards, cash or wallets. Perfect for daily air travel. Indoor/outdoor activities, international travel, camping, hiking and overnight tours. 3. Large Capacity and Portability: The main compartment with an oversized opening design provides large storage space for easy removal or placement of clothes. Two front zipper pockets for mobile phone, wallet or keys, glasses, books and some small items. Side pocket for kettle or umbrella. Sturdy soft handle with foam top for easy carrying. Suitcase straps allow the backpack to be attached to the luggage compartment/carry-on and slide the suitcase's upright handle for easy transport. 4. Backpack's Scientific and Technical Back U-shaped three-dimensional ventilation design, air convection, ventilation and heat dissipation. Comfortable, breathable mesh straps and rich spongy pads help relieve the burden on the shoulders. Adjustable shoulder straps relieve the burden on the shoulders. The ergonomic design ensures that the backpack's gravity is distributed, making it comfortable to carry even when full of all equipment. 5. USB Port: The practical design is equipped with a USB charging port, which is convenient for charging your electronic devices. Connect the devices with external cables and your own power box inside. Tip: Mobile power is not included.