Used once. *Backpack not included. This is a storage bag specifically for backpacks, also known as a bag-in-bag.* There are no major noticeable stains, but there is some wear and tear. It will be folded, compressed, and shipped in simple packaging. Please refrain from purchasing if you are sensitive to minor imperfections or seek a perfect item, as this is a personal item stored at home. Please understand that there may be overlooked scratches or stains due to my subjective assessment. Main body size: Approximately W25 x D9.5 x H35cm (excluding handle) Material: Body = Polyester / Core material = EVA / Ribbon tape = Polypropylene / Metal fittings = Steel Suitable backpack size: Length 38cm, Width 30cm, Depth 12cm or more Backpack, backpack contents, organization, children, bag, kids, adults, documents, work, office, mother's backpack, mom's backpack, school, commuting, students, junior high school students, high school students, university students, smartphone, wallet, textbooks, notebooks, pen case, large capacity, many items, bag, small item storage Men's, women's, inner bag, inner bag, vertical, vertical, backpack organization, contents of the bag, bag, bag, pouch, pouch, pocket, organization, storage, storage pocket, small item storage, convenient goods, A4 size, long vertical, rucksack, daypack, backpack, business bag, school bag, commuting, school, travel, travel, business trip, outing, lessons, cram school, blue, blue, light blue, sky blue, black, black, bicolor, mesh pocket, mesh material, contents visible, with key hook, with hook, self-supporting, prevents collapse, dividers, with gusset, slim, lightweight, large capacity, multi-functional, gadget pouch, cosmetic pouch, stationery case, smartphone case, writing instruments, lunch box, drinks, bottle holder Color...Black系 (Black color family)