FUTURES THERMOTECH 5-FIN SETMade 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. Template Category Neutral (balanced, all around) Construction Thermotech Sizes: Small F4, Medium F6, Large F8