Men's Backpack Large Capacity Computer BackpackProduct information Opening method: zipper Applicable gender: neutral male and female Material: Polyester Whether to bring a lock: No With or without rain cover: Yes Function: Breathable Processing methods: soft surface Hardness: soft Pattern: plain Lining texture: polyester Accessories type: backpack shoulder pads Strap root number: double root Carrying parts: soft handle With or without lever: No Is there a back cushion cotton: Yes Waterproof