A63B 2031/117

Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet attachable only to the feet {with blade at an angle to the plane of the foot when in use, e.g. to reduce plantar flexion with blade lying substantially in the body-symmetrical plane, e.g. for breast stroke}