I usually wear a drytop when kayaking, but I bought a drysuit for the really cold days, and for use in the ocean. I noticed when practicing combat rolls in flatwater that there is a noticeable drag that seems to tug the body away from the roll due to the large crease created by the front zipper, that is if I roll up on the right side. Nothing I can't deal with, but it definitely slows my initial movement under the water. Note I am kayaking an anas acuta, i.e. this is not a river boat, but I assume that the same thing would occur, even worse if you rolled in an eddy. Anyone ever notice this with the Kokatat suit?