The DMC Elite fins were designed as all round swim training fins for intermediate to advanced athletes. They have more recently become a favorite choice as bodyboard fins due to their small size and how comfortable they are. The DMC Elite fins were designed as all round swim training fins for intermediate to advanced athletes. They have more recently become a favorite choice as bodyboard fins due to their small size and how comfortable they are. They have the same power as a stiff bladed fin due to the V Rail design which helps displace more water with both up and down kicks and are so soft and comfortable thanks to their silform construction compared to most standard swim fins which are made of rubber or other polymers. How to check your Fin sizing: Push the fin well onto the foot prior to pulling the strap. Sit on a chair, extend your legs, and flex your ankle/foot out. This is your swimming position. They are not a shoe so standing in them will not test the correct size.