Originally Posted by
cyccommute
Jogged my memory of use in TdF. Looked up; SI.com : In the team time trial in the Tour de France on July 5, 2005, Bobby Julich and his Team CSC teammates used an iteration of CamelBak’s RaceVest. The low profile reservoir, which held about two water bottles-worth, was strapped to their backs. CSC won that stage, but, Galten says, “they outlawed it after that because basically it gave an aerodynamic advantage.