For really hot days when every extra centimetre of fabric feels too much, sleeveless cycling jerseys and cycling tops offer maximum ventilation on the uphills and allow your body's own cooling process to work unhindered. Sleeveless jerseys often come with a long front zip to adjust ventilation according to your ride. Their light functional fibres reliably conduct moisture away from your upper body and provide a dry feel on the skin. If the wind picks up during a downhill run, this prevents you getting too cold too quick.