Centrally articulated swin fin
Closed shoe swim fin
Collapsible propulsion aids for swimmer's feet
Combination of strap and buckle for diving fins
Combination type of floating cylinder for swimming and...
Combination water shoe and swim fin
Combined kick board and arm stroke swimming practice device
Combined swimming aid and lifesaving device
Composite swim fin with cantilevered heel
Convertible amphibious shoes for swimming and walking