The Thermo tri range from Futures is a neutral template fin offering a consistent flex that creates drive and release through turns. Geometry Well proportioned neutral template delivering a balance of drive and release. Material Thermotech. Made in Huntington Beach, the Thermotech product line does not have the traditional plastic feel of a composite fin. Instead, they have a consistent flex that creates drive and release through turns. Thermotech fins come with the Futures Truss Base, making them lighter and stronger. Ideal Conditions A wide range of conditions from beach breaks to point breaks. Board Types Recommended for all board types. Fin Family F Series. A balance of drive, pivot and release. Size F4 (55Kg - 70Kg / 120 - 155 Lbs)F6 (65Kg - 80Kg / 145 - 175 Lbs)F8 (75Kg - 90Kg / 165 - 200 Lbs)