Capacity: below 20L Internal structure of the bag: zipper pocket Opening method: zipper Applicable gender: neutral / male and female Material: Oxford cloth Function: waterproof, breathable, anti-theft, wear-resistant, lighten, shock-proof Processing methods: soft surface Hardness: Medium Style: Business Lining texture: polyester Types of accessories: buckle Strap root number: double root Lifting parts: soft handle Type of outer bag: three-dimensional bag Bag shapes: square vertical section