The TYR Stryker Silicone Fin is engineered to promote short, quick movements through the legs and feet, making it excellent for improving a swimmer's kicking motion. Features Short blade training fin Promotes short, quick movements through the legs and feet Helps swimmers create the natural flow of a flutter kick Prevents the feeling of restriction as you move Color Coded Sizing for easy identification:   S (Men’s Shoe 5-6 , Women’s 6.5-7.5) - Orange/Teal/Yellow/Clear M (Men’s Shoe 6-7 , Women’s 7.5-8.5) - Blue/Yellow/Clear L (Men’s Shoe 8-9 , Women’s 9.5-10.5) - Orange/Blue/Clear XL (Men’s Shoe 10-11 , Women’s 11.5-12.5) - Navy/Red/Clear XXL  (Men’s Shoe 12-13 , Women’s 13.5-14.5) - Blue/Navy/Clear Details Material(s): 100% Silicone Closure: Slip on Country of Origin: Imported