Designed to be added to a pack or carrier via MOLLE. I bought this to attach to a Gryphon EDC pack, and then never ever used it. Hasn't been hooked to any pack, it went on the shelf and was forgotten about it. Seriously, it's brand new, doesn't even have the wrapper removed from the bite valve. Bladder has never had a drop of liquid in it, hasn't even been cleaned out yet. So, this is basically brand new.