Finis Positive Drive Fin M Yellow - L

The Finis Positive Drive Fin uses a unique ellipsoidal fin to generate the correct propulsion on all four swim strokes. The asymmetrical fin design allows the swimmer to develop power while promoting a natural internal supination kick style for butterfly, back and freestyle. A closed-tip design that provides superior energy transfer from leg to foot.Features:- Asymmetrical blade shape promotes a natural kick cycle - Adjustable heel straps create a custom fit - Ideal for training for individual events combined - Ergonomic foot pocket places feet in an ideal position for swimming