Thermotech fins do 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. Specifications:                                Side fins        /    Centre fin Area :          14.22              /     14.22 Height:         4.37             /        4.37 Base:            4.22             /        4.22 Foil:             flat              /         symm