Product 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 degree: water repellent Basic version plus size: side pockets, computer compartment, cushioning shoulder strap, can hold 16-inch computer Enhanced and upgraded version of extra size: side pockets, computer compartments, cushioning shoulder straps, luggage straps, USB charging ports, back pressure reduction system, hidden anti-theft bag, can hold 16-inch computers Basic version large: side pockets, computer compartment, cushioning shoulder strap, can hold 15.6-inch computer Enhanced large size: side pockets, computer compartment, cushioning shoulder strap, luggage strap, USB charging port, back pressure reduction system, hidden anti-theft bag, can hold 15.6-inch computer A: Black basic edition plus size B: Black enhanced version plus size C: Navy blue basic version plus size D: Navy enhanced version plus size E: Gray basic version plus size F: Gray enhanced version plus size G: Bordeaux Basic Edition Extra Large H: Claret Enhanced Edition Extra Large I: Pink basic version plus size J: Pink enhanced version plus size K: Black Basic Edition Large L: Navy Blue Basic Edition Large M: Grey basic version large N: Bordeaux Basic Edition Large O: Pink Basic Edition Large P: Black enhanced version large Q: Navy enhanced version large R: Gray enhanced version large S: Claret Enhanced Edition Large T: Pink enhanced version large U: Black Medium Special Edition Packing list Backpack *1