RIP SF500 Premium Bodysurf, Bodyboard and Snorkel Fins | These Float! | Intermediate to Advance Level Swim Fin (Flippers), All Types of Waves | Lateral Ribs & Gum Rubber Blade, Comfort w/Speed & Control, Boogie Board, Diving, Snorkel, Surf, Swim, Ultra Propulsion and Thrust! RIP SF500 Fins - Bodysurf and Bodyboard Fins that suit all types of waves and are intended for intermediate and advanced bodyboarders and bodysurfers. Powerful and responsive bodyboard fins thanks to the lateral ribs and the rubber blade… And they float too! SIZES: S: 38-39 MS: 39-40 M: 40-42 ML: 42-43 L: 43-45