* The use of stiff material in the sole reduces the flexibility of the foot, achieving more efficient finning action.
* The neoprene area around the ankle is made of super-elastic material. The lower section, in standard neoprene, ensures warmth and adherence.
* YKK zip, with internal neoprene gasket to limit water seepage.
* Reinforcement on the toe and heel.
* Rear notch for securing the fin strap in place.
* Raised heel to keep your more balanced carryng all the weight of the equipment.