Propulsion device for use with swimmers

Propulsion gaiter for float fishermen

Propulsion structure for a water craft

Pull paddle for swim training

Retractable fin assembly

Retractable swim fin

Retractable swim fin

Scuba diving fin

Scuba fin

Short motion swim fin

Short motion swim fin

Short motion swim fin

Spear-blade swim fin

Staged expandable swim fin

Stretchable foot pocket of fin

Structure of amphibious shoe

Surfing saucer

Swim and exercise hand paddles

Swim and exercise hand paddles

Swim and scuba fin