Haven't paddled with it yet, but after running a hose over it for 5 minutes, it kept me completely dry. Warm, blocks the wind well, and is relatively comfortable for what it is. I was concerned that I was too big? for the medium, but I just made it with a fleece layer inside. I'm 5'6" 168 for reference. The arm pockets are however, quite difficult to navigate, you really need a 3rd hand, it could be better situated.