Backpack computer bagBag size: medium Capacity: below 20L Internal structure of the bag: mobile phone bag, sandwich zipper bag, camera pocket Opening method: pumping Applicable gender: male Material: Leather Cortical features: cowhide Whether with a lock: yes Function: Wear resistant Processing methods: soft surface style: Casual Lining texture: cotton Strap root number: single Lifting parts: soft handle Type of outer bag: bag with lid Bag shapes: square vertical section