I purchased this about three months ago and tried attaching it to a run-ruck inside the house once, but it was for a school bag and didn't fit the run-ruck... so I couldn't use it and am selling it! ★ Only tried it on once, then stored at home. ★ Name has been blacked out. It's almost new and unused, but I did try it on and have stored it at home since then, so please understand this before purchasing. ※ The shipping method may be changed from standard mail to Yu-Yu Mercari delivery. If you purchase this item, you are agreeing to this change. Thank you for your understanding! Large Capacity: It has a large capacity that can fit A4-size files, so you can rest assured even on days with a lot of luggage. Hands-Free: Because it attaches to a school bag, you can go to and from school safely with both hands free. Water-Repellent: It has a water-repellent finish, so you can rest assured even on rainy days. Lightweight Design: It has a lightweight design that won't burden your child. Safety Design: It has reflectors, so you can rest assured even at night. Product Information Product Size (per side) / W50 x D170 x H330mm Product Weight / 180g (including packaging materials) Packaging Size / W270 x D50 x H433mm Material / Body: Polyester, Belt: 100% Polypropylene #SchoolBag #Sandoseru #SchoolBagStorage