Medium cushion shin and foot, over the calf height. Flat knit durable toe seam for high burst strength, 1x1 ribbed welt, 1x1 ribbed leg. * Men"s sock sizes - Medium (fits US shoe size 6-8.5) Large (fits US shoe size 9-11.5) X-Large (fits US shoe size 12-14.5) * 70% Merino Wool, 28% Nylon, 2% elastane. Washer and dryer friendly! * New 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep sock in place. Strategically placed mesh ventilation zones provide temperature and moisture management. * Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable.