It's Jetboil gas, what else do you need to know? The little cannisters are great for chucking in your webbing with a folding gas stove, water bottle and a cups canteen so you can brew on the go. Also fits nicely in the external pocket of my civvy pack so I can get a brew on without having to rat through the interior of the pack. Would caution that the baby cannisters seem a little unstable on the OG Jetboil, or it could be operator error (I don't use a stabiliser thingy), I would recommend the larger cannisters for that, but your experience may vary. As a final thought, the Jetboil branded gas seems to be more efficient than others on the market, particularly in really cold conditions