The tdf pro yellow jersey utilises a technical polyester fabric with stretch to provide a close aero fit whilst also giving excellent moisture management the rear is more open allowing for increased wicking and sweat evaporation to keep you cooler on hot summer days to increase airflow on the hottest of days and on climbs you have a full length front zipper for the 2017 tour de france le coq sportif has added a tricolour trim along the back seams of the leaders jerseys the trimm