Canvas Leisure Backpack Computer Bag Student School Bag(Navy)1. Material: canvas, super fibrous skin 2. Inner lining: Polyester cotton cloth 3. Pull rope beam, easy to open and close, convenient and practical 4. Use a soft webbing with a hand, comfortable with grip 5. Breathable strap, honeycomb absorbing sweat, comfortable hand feel 6. There are hardware adjustable buckles on the shoulder strap, which can be freely adjusted according to your own needs 7. Uses: casual street 8. Structure: front bags, main bags,