I inquired about purchasing this backpack, which was on display at Mountain Research in Nakameguro a long time ago. If I recall correctly, the main body was a KELTY MOUNTAINEER FRAME PACK 32591852. As the photos show, the KELTY patch was removed and replaced with a patch that Mountain Research had made at the time. I remember being told that this backpack was prepared for displaying the products. Therefore, it's not an official collaboration item or a W-name product, but it has that feel, making it a unique item, likely one-of-a-kind. I used it for mountain climbing several times after that. The main body is a representative product of the long-established outdoor brand KELTY, so there were no quality issues. (I used it for climbing Mt. Fuji as well.) As far as I can tell, there are no major damages, breakages, or stains. Of course, it is a used item, so please consider that it is an old product. Please understand that we cannot accept returns. Khaki nylon backpack with storage pockets, functional. - Brand: MOUNTAIN RESEARCH x KELTY - Color: Khaki - Material: Nylon - Features: Backpack type - Accessories: With storage pockets For detailed specifications, I've attached two links below to pages that introduce the same KELTY product: https://item.rakuten.co.jp/d-park/kt32591852/?variantId=64025 https://web.goout.jp/fashion/53942/ Thank you for viewing.