Castelli free tri top only the best of the best products are given the esteemed rosso corsa label innovative engineering and rigorous testing ensures that you receive performance garments that will optimise your performance in all three disciplines the free tri top is packed with features that perform for you the free tri top features the latest in wind tunnel tested hydrodynamic and aerodynamic fabrics speedfreak ventilated race fabric on the front and velocity mesh on the back high capaci