Used Bontrager Adventure Boss Frame Bag. This item is a used Bontrager Adventure Boss Frame Bag. I used it a few times and then stored it, but I no longer need it, so I am selling it. In my subjective opinion, the exterior and accessories are in a beautiful condition, almost as good as new. However, there is some staining inside the bag; please check the photos. This is a used item, so please refrain from purchasing if you are concerned.