The eldorado shirt uses a lightweight 100 polyester knit with no elastane so doesnt trap water and with a textured inner that mechanically wicks moisture away from your skin for amazing comfort high air permeability maximises airflow and evaporative cooling so you dont overheat when pushing on the pedals carefully crafted patterns achieve a functional but casual fit not bagging out when yoursquore leaning forward on the bike although the simplest top in the 7mesh line it