Black DUGAN SPINE 50-60 backpack with adjustable straps and a breathable back panel. - Model Name: DUGAN SPINE 50-60 - Color: Black - Features: Adjustable straps, breathable back panel Purchased last August and used twice: a 2-night, 3-day trip to Tateyama in September, and a 1-night trip to Yatsugatake in October. The back panel, which flexibly conforms to the back, provides the best carrying comfort. Also, I like that it can be opened with a zipper from the front, making it easy to take things in and out. I am selling this as I have purchased an UL (Ultra Light) backpack, and I hope someone who can fully utilize it will purchase it. Thank you for looking.