Omega Flip Fin Stealth Military and Rescue Style Scuba Diving Fins Patented Flipfin design provides total mobility in and out of the water Two-piece hinged fin allows blades to fold up to allow full mobility out of the water and click down with a first kick once in the water The Stealth model's short blade provides maximum propulsionwith minimum effort and makes entries and ascents significantly quicker and safer Flip Fins are used by US Navy Seal Teams, SOCOM and Air Force Rescue Teams Find your correct size: Large for Men's US shoe size 9-11, X-Large for Men's US shoe size 11-14