1. Main material: Nylon
2. Lining texture: polyester
3. Opening method: zipper
4. Internal structure: front zipper pocket front storage pocket zipper main pocket built-in interlayer pocket
5. The backpack has double-layer front pockets, which can be used to store various items
6. Metal slider, strong and durable, smooth pulling and closing
7. Fabric toughness, comfortable to carry, strong and durable
8. Comfortable shoulder strap, adjustable length
9. Size: the large size is about 20 x 17 x 8cm, the small size is about 12 x 16 x 7cm
10. Weight: the large size is about 320g, the small size is about 230g
11. Note: only the backpack, not including other items