The Stinger 8 is an incredibly versatile roll-top drybag designed to mount as a tail/fender bag on smaller bikes, for carrying tools, tubes and other essentials, or as a topper on hard-side panniers or top boxes. It also turns into a backpack, in case you need a daypack for hiking into a hot spring, or making a quick trip to the store for supplies. The backpack straps stash away in an internal pocket, and then deploy through the opening of the bag, clipping to two d-rings on the bottom.