This is a Zero Point (Montbell) backpack. Approximately 57cm high x 40cm wide when laid flat. Weight is approximately 600g. I believe it's the "Classical Balance Light 30," but I've lost the receipt and records, so apologies if it's incorrect. It's around 30-35L and lightweight, so I used it for day trips and overnight mountain trips. It's not very waterproof. There are minor scratches, but there's no damage to zippers or parts, no tears in the main body, no strange odors, and no mildew smell, so it's in usable condition. It's been stored in a non-smoking environment with no pets. I used it for mountain trips and travel 1-3 times a year for several years. Manufacturer's description: This is a simple, lightweight pack with a two-layer storage area, a rain cover, and a main compartment. A single frame runs horizontally at the shoulder strap attachment points, making it easy to load and unload your belongings. The back padding prevents the contents from feeling uncomfortable against your back, and removing the padding allows it to be compactly stored, making it useful as a sub-backpack.