Pearl Izumi Men's Pro Low Sock 91% polyester 6% nylon 3% Spandex Made in US Spring/Summer 2013 The mens PRO Low Sock is the first sock with Minerale yarn, providing industryleading moisture transfer with compression fit bands 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