The HSF / Aeria Ultimate FC hydration system is designed to seamlessly integrate with the Aeria Ultimate Stem - and combined with the Aeria Ultimate aerobar this system provides a fully integrated front end super bike solution for any time trial bikeA rubberised shroud ensures that the aerodynamic line between bottle and frame is complete,This BTA system features the race proven no splash refill port, a straw magnet mount for streamlined airflow over the top of the system, a bite valve for fluid control and a removable computer mount,Capacity is a hydrating 857ml and system weight is 420g.