Large capacity computer backpackMaterial: Nylon Opening method: zipper There is no liner: Yes Internal structure of the bag: ID bag, mobile phone bag, zipper pocket, computer pocket Function: waterproof, breathable, wear resistant, lighten, shock proof Style: Backpack Backpack style: Casual Hardness: Soft Bag shapes: square vertical section Lifting parts: soft handle Type of outer bag: digging bag Lining texture: nylon Strap root number: double root