We have a lot of guys wanting to maximize the utility of Mystery Ranch's smaller Guide Light Frame packs, and this is the easy solution to do just that. The 25L provides 1526 c.i. of additional, waterproof storage. If you're wanting to run a Pintler to haul a small gear cache while scouting, here you go.
Built from 210 D TPU coated ripstop nylon with a roll-top buckle closure to keep contents dry in the dankest conditions.