Large capacity 40L! Retail price: 5,500 yen (excluding tax) It's made very sturdy. It's also carry-on size and can be attached to a carry-on bag. I bought it for travel, but it was larger than I expected, so I didn't use it. The outer bag has been opened, but it's unused. Material: Faux leather, polyester, polyamide Color: Black Scene/Type: Town use (everyday use), Outdoor/Hiking/Camping, Business Travel backpack, carry-on, expandable, USB charging port, anti-theft pocket, 17-inch waterproof lightweight, weekender, laptop, computer, book bag, for club activities, junior high school students, high school students, college students, business, school bag, outdoor, hiking, college, daypack, travel, travel