Great heavy duty water bladder.
"Very heavy duty water bladders. I do file off the lip of the small flip up nozzle before I put new bags to use as I've had problems with gear snagging and opening the valve. I also like the fact that you can use a Nalgene cap to reduce weight and potential leak points. I usually do this on reserve bags when I'm using multiple bags and use the Dromedary cap for the in use bag. I use these bags for whitewater kayaking where it's getting tightly packed in with other gear and I trust that this bag will hold up and not leak more so than any other bag I've used."