Zone3 Tri Suit Size Chart 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 3/4 length sleeves and slightly thicker fabric than the rest of the Lava range this top offers some unique properties which makes it suitable for warm weather races but also perfect as an extra layer or worn by itself in cooler or wet conditions. Features: - Extremely aerodynamic. - Extra warmth for colder events and workouts. - Comfort next to the skin. - Functional fabric with optimum temperature control. - Highly breathable and sweat wicking. - Full front zipper allows extra airflow and ventilation - Nutrition storage is maximized with big pockets on the back to stock up on nutrition and make it easy to access whilst on the bike or run. - Optical white color helps reflect the suns heat and offers high UPF protection. - 2017 model