This is a custom-made mountaineering backpack crafted from lightweight, tear-resistant, durable, and waterproof X-Pac material. The soft polyethylene sheet stay inside the back panel ensures the shape of the back and supports the load. Capacity: 40-55L Height: 56-91cm x Width: 26cm x Depth: 20cm Weight: Approximately 850g All 6 additional options are included. Purchased this year (May 2024) and is brand new, only inspected with items inside. I am selling it because I can no longer use it due to unforeseen circumstances. Thank you.