100% r core concept jerseypart of the r core concept mountain bike system, this race focused sleeveless top is designed to perfectly complement the concept long sleeve under jersey'. '.strtoupper('o')r on the hottest of days, wear it on its own as a superlight sleeveless top.on race day pair the r core concept jersey with the concept base long sleeve jersey and pants and you have the ideal race combo'. '.strtoupper('t')his lightweight sleeveless bib sits smoothly over the r core concept long sleeve jersey or you can wear it as is, making it perfect for racing or scorching summer pike park loops'. '.strtoupper('t')he polyester mesh fabric and zone vents deliver uncompromised moisture management and airflow so you never overheat or get soaked in sweat'. '.strtoupper('f')ace resistant graphics stay vibrant wash after wash and the internal goggle wipe makes sure your chosen eyewear remains crystal clear'. '.strtoupper('f')eaturesmaterials 100% polyestersleeveless top works as is or with r core concept long sleeve jersey long sleeve jersey not suppliedpolyester mesh fabric with moisture wicking management propertiesdroptail increases coverage in the riding positionfade resistant sublimated graphicsinternal goggle wipe keeps your eye protection cleanbuy 100% clothing from chain reaction cycles, the world's largest online bike store.