Applicable gender: neutral / both sexes Cover opening mode: zipper Lining texture: Polyester Size: 27cm wide, 13cm thick and 38cm high Color: black, khaki, coffee, lake blue, gray Function: breathable, wear resistant Style: Leisure Internal structure: zipper bag, mobile phone bag, certificate bag, sandwich zipper bag, computer insert bag Number of shoulder straps: Double Capacity: 20-35l A backpack that allows you to travel: the canvas material is flexible enough to retain its natural and simple appearance, and the fabric texture is thick and durable with good air permeability Logo design, simple design, easy to use The bag is made of nylon, which is comfortable and durable Triangle date reinforcement, wear-resistant and durable, strong bearing capacity The shoulder strap can be adjusted according to personal needs, so it is easy to use Double pull head design, smooth and easy to pull, strong and durable Skilled workmanship, even wiring, wear and durability Side pocket design, can put water bottle, umbrella and so on, easy to use Safe back bag, can put valuables, anti-theft, safe and practical