Appearance design Simple fashion: the overall design is simple and generous, smooth lines, without too much cumbersome decoration, can be matched with a variety of styles of clothing, suitable for different occasions, whether it is daily travel, travel or sports and fitness can be easily controlled. Color selection: Provide a variety of classic fashion colors, such as black, white, pink, brown, etc., to meet the individual aesthetic needs of different consumers, and these colors are dirty and easy to take care of. Size portability: The overall size is moderate, the shape is relatively small, easy to carry and store, will not bring too much burden to the user, but also can meet the loading needs of daily necessities. Material property Lightweight and durable: The use of high-quality nylon or polyester fiber material, light weight, reduce the burden on the shoulder, while having good wear resistance, tear resistance and waterproof performance, can resist the daily use of friction and slight rain invasion. Breathable and comfortable: The back and shoulder belt of the backpack are made of breathable mesh fabric or special breathable foam material, which helps air circulation, sweat and breathable, keep the back dry, and reduce the stuffy feeling and discomfort. Internal structure Large capacity main compartment: The spacious main compartment can accommodate items such as clothes, books, tablets, small cameras, etc., to meet the loading needs of travel, business trips or daily commutes. Some backpack main compartments are also equipped with zipper mesh space, optional intermediate racks and compression straps to facilitate organizing and securing items. Multi-layer design: In addition to the main layer, there are a number of small partitions and pockets, such as internal security zipper pockets, which can be used to store valuables, such as wallets, passports, ID cards, etc. External front and front top pockets for quick access to travel essentials such as tickets, mobile phones, keys, etc., during transit. Computer compartment: Some portable backpacks are specially designed with internal zipper laptop cover, the size fits the common laptop size, and has good buffer protection function, which can effectively prevent the computer from collision and scratching. Functional design Expandable space: Some backpacks have expandable storage space, and by opening the fully unfolded zipper, you can add a certain percentage of additional packaging space, which is convenient to carry more items when needed. Multiple ways to carry: With removable and adjustable shoulder straps, chest straps and belts, it can be used as a backpack, shoulder bag or crossbody bag depending on individual needs and usage scenarios, and with strategic external handles for easy portability. Personal details: For example, with a hidden ID pocket, convenient storage of personal information cards; The two sides of the bag are provided with water bottle bags or accessory bags, which can be used to place water bottles, umbrellas and other items; Some backpacks also have an anti-theft automatic lock function to provide more security for travel.