Zone3s priorities when designing this top were aero dynamical comfort next to the skin functional fabric with optimum temperature control easy access to pockets for nutrition uv protection the aero top is a very useful piece of kit to have in the locker event conditions can change quickly and with more ironman events taking place earlier and later in the season this top is designed to help you brave the elements with longh sleeves and slightly thicker fabric than the rest of the lava range t