When you feel the need to get back to basics, the Alpen Tech Tee delivers tech tee ease with the highest of technical performance for the hottest of days in the saddle. We partnered with Polartec on this ride shirt to develop a fabric using their Delta cooling yarn technology. Delta next to skin yarns use your body's natural cooling process keeping you cool. Delta works efficiently by elevating touch points for increased airflow, faster moisture dispersal and reduced wet-cling. When its HOT.. the Alpen Tech will keep you cool.