For those of you who know DaFIN is one of the better swim fins around. Have had a pair for the last 3 or 4 years and have been solid. Use them mostly for body surfing with and without a handboard. They have a good flex but also the right amount of stiffness If you are looking for a good swim fin for the summer or even to chuck in the backpack on your next Surf trip don’t think these swim fins will let you down. If you need a heavy qualifier -they were developed in Hawaii with input from Mark Cunningham and Brian Keaulana. DaFiN is also the standard issue equipment for the Hawaiian Lifeguard Association.