An OMS favorite! Slipstream Fins are made with monoprene creating a lightweight but high performance fin. Made with a spring heel strap, Slipstream Fins give divers an easy donning fin that will also “deliver the goods” in any condition. The light weight helps to keep the divers legs in optimal position when a low-silting kick is necessary and is also optimal for divers reduce damage while working around sensitive marine areas like coral reefs. Made with Monoprene Includes Spring Heel Straps Excellent Performance Lightweight L = 2.25 lbs with Spring Heel / 4.5 lbs pairXL = 2.55 lbs with Spring Heel / 5.1 lbs pairXXL =2.95 lbs with Spring Heel / 5.9 lbs pair SlipStream Fin Sizing What Size Fins Do I Need? This can be challenging as a persons shoe size is only part of the answer. What a person is wearing on their foot plays the biggest role. For example, wetsuit boots come in a wide range of thicknesses from ultra thin to 8mm thick. They also come with different types of soles including soft, hard and even a tennis shoe-type sole. Drysuits have all different types of boots with different soles, lengths, heights and widths and then combine them with the virtually limitless types of insulation worn underneath. And finally no matter what “should” fit is over shadowed by what feels right to you as the diver. At OMS we strive to provide you with the most accurate sizing information possible. Therefore we have focused on what we know best which is the OMS Drysuit SuperFlex Boot and DUI RockBoot. We suggest that if you do not know, you are welcome to purchase more than one size and return the size you do not want, however you will be responsible for the return shipping charge. Simply return the unused pair of fins in their original packaging within 30 days and you will receive a full credit. The best option is to purchase your OMS SlipStream Fins from a professional OMS dive center.