Product Category: Travel Bag / Travel Bag Capacity: 36-55L Internal structure of the bag: ID bag, mobile phone bag, sandwich zipper bag, zipper hidden bag, computer slot bag Open the way: zipper Is there a tie bar: No Whether with lock: No Material: Polyester Strap root number: double root Lifting parts: soft handle Function: waterproof, storage, breathable, wear-resistant, load reduction, shock resistance Type of accessories: Backpack shoulder pad Applicable gender: Unisex / Men and women Processing methods: soft surface Lining texture: polyester pattern: plain Hardness: Soft