I''m an avid body boarder who was looking for something "off the menu" as far as fins are concerned. I''d been using Vipers for quite a while and though the propulsion was great, I couldn''t quite get the turn-over that I needed to really propel me through heavier conditions.The Kicks surf fin really turned that around. With a blend of stiff and more flexible rubber the Kicks manage to be light weight and provide significant thrust (snap) that I require in any conditions. Good stuff!