Performance Thermotech Fin Series The Performance Thermotech fin series combines all-around template fins with patented Thermotech material for consistent flex and improved performance. Performance 6” Thermotech Template: All-Around Construction: Thermotech (consistent flex) Base: Futures Truss Base (light and strong) Size: Small Longboard Use: Standalone or 2 + 1 | Performance 7” Thermotech Template: All-Around Construction: Thermotech Base: Futures Truss Base Size: Medium Longboard Use: Standalone or 2 + 1 | Performance 8” Thermotech Template: All-Around Construction: Thermotech Base: Futures Truss Base Size: Medium Longboard Use: Standalone or 2 + 1 | Performance 9” Thermotech Template: All-Around Construction: Thermotech Base: Futures Truss Base Size: Large Longboard Use: Standalone or 2 + 1 The Thermotech fins offer versatility, stability, and maneuverability for longboard surfing, enhancing your experience in various conditions.