Just went and grabbed my Eddy Flippers for a pool session, whatever Eddy Flippers are made from as a technopolymer it is nothing like a real Scubapro Jet Fin except in appearance. The material is not the same. I am probably wrong as to the polymer of Eddy and Go fins being the same or similar but neither are the "rubber," if it is rubber, that Jet Fins are composed of. Not at all.I also believe that Eddy fins (as well as ScubaPro Jet fins, Hollis F1 and F1 LT fins, and a number of others) are rubber with no monoprene. That is why they are so durable. They are VERY durable.