Blackburns Outpost Frame Bag takes up all that empty space in your touring or bike-packing frame and keeps cargo weight centralized for predictable handling. External mesh and slip pockets keep essentials close at hand and the zippered main compartment includes a baffle to help keep things organized. For picking up extra items along the way or for when repacking gets a little sloppy near the end of a trip the bottom is expandable to create some extra room which is always welcome.