Following Trilastic system concept, Mares created the Mares Trilastic 5mm Boot which is one of the most comfortable boots. The Mares Trilastic 5mm Boot was engineered to grant the highest control and power transmission during finning action. Comfortable hard sole boots, engineered to grant the highest control and power transmission during finning action. The neoprene area around the ankle is made of super-elastic material. The lower section, in standard neoprene, ensures warmth and adherence. Rear notch for the securing the fin strap in place.