The Control Heavy Jersey has been tailored to have a less tight fit, but remain highly aerodynamic by anatomically fitting to your riding position on the bike. The chest and frontal arm panels are constructed entirely from Swiss-made wind and water repellent Schoeller fabrics. The back panel is kept soft and highly breathable with M.I.T.I Super Roubaix fleece. These panels have also been DWR treated for increased hydrophobic properties in order to prevent moisture absorption.