Pearl Izumi Men&#39;s Pro Leader Jersey, Red, Small/Medium Body: 91% nylon 9% elastane/ UPF 50+ Technology: coldblack Weight: 158 g/m2 Sleeves: 80% polyester 20% elastane/ UPF 40+ Imported Fall/Winter 2013 The PRO Leader Jersey incorporates advanced material technology, construction methods and an aerodynamic form fit The perfect balance of anatomic fit, performance engineered materials and the personal interface between athlete and gear A clothing system that works to help you maintain the perfect temperature for the weather conditions and activity range day in and day out