Features of the Hollis F1-
The Hollis F1 fin is construced from a high grade, heavy duty rubber
Angled strap mounts for comfort and a better transition of power
Spring heel straps w/ easy-grip heel tab
Multiple strap mounting positions for a fine tuned fit
Vented blade to reduce stress while accelerating water over the blade
Lastly the Hollis F1 fin comes with a generous foot pocket
