DESCRIPTION Winner of the Australian Design Award. The world's only silicon based fin - eradicates ulcers while providing super ergonomic foot pocket design and movement. The most user friendly and ergonomically designed surfing fin available! FEATURES Uses T Form instead of rubber creating the most comfortable and foot friendly fin on the market reducing effort to create thrust. Patented 'V' Rail design provides greater surface area for extra thrust. Super efficient drain holes meaning your flippers aren't filling up and anchoring you down. Left and Right moulds mean each fin is tailor made to the natural movement of your legs. These fins do not float, it's very important to wear fin savers. SIZING XS (Mens shoe size 4-5) S (Mens shoe size 6-7) M (Mens shoe size 8-9) ML (Mens shoe size 9-10) L (Mens shoe size 10-11) XL (Mens shoe size 12-13)