Why do you need helmets for kayaking? Answer: When you fall out in the middle of rapids and discover through touch and feel what creates white water. After negotiating a rapid, we would turn around, paddle upstream and river surf. This involves paddling like crazy to get into the eddy created by the whitewater in front of you. When you “climb the wave”, you can stop paddling and you will remain stationary surfing the river. Getting in and out of this position is rather tricky, however, and gave me a dozen opportunities to practice water rentry into my capsized kayak.