Thank you for viewing. This is a North Face backpack purchased around 2018. I used it for hiking about twice, but I haven't used it since I bought another backpack, so it has been stored at home for a long time. The 40-liter capacity is a convenient size for multi-day hut stays from spring to autumn. I used it in the Southern Alps in summer for a lightweight, ultra-light style tent stay, and it barely worked. The roll-top closure allows for flexibility in capacity, from around 30 to 40 liters, which is convenient. The lightweight aluminum frame and trampoline structure on the back provide excellent breathability, reducing stuffiness on your back. The back feels soft and comfortable, and because it has a frame, unlike ultra-lightweight frameless backpacks, it's easy to pack and provides a stable carrying experience. The bottom, which is prone to abrasion, is made of 210D ripstop material. The bottom is designed to be slightly slanted, not flat, to bring the center of gravity of the luggage to the center of the backpack. Therefore, it does not stand on its own. The backpack itself is not ultra-lightweight, but it's recommended for fast-hiking enthusiasts who try to lighten the overall weight of the backpack by using lightweight gear! ● Model Number: NM61702 ● Size: L size, back length approximately 51cm ● Specifications: Mesh frame structure on the back, roll-top closure, back stretch pocket, side mesh pockets, bottle pocket on the shoulder, internal zipper pocket (with key clip), hydration compatible ● Condition: The compression parts inside the main body storage are peeling off in some areas, but there is no stickiness from the waterproof coating or odors due to hydrolysis on the rest of the back. ● Other notes: There are individual differences in how scratches and stains appear and are perceived, so please refrain from purchasing if you are concerned about minor details. Please consider this item as a used item and understand that it has been inspected by an amateur. Thank you.