Key Features:The original DeFeet wool sock, the Wooleator, has been consistently upgraded and remains the gold standard for a year round, all weather cycling sock,Affordable and incredibly durable, Wooleator\'s are the most popular four season wool cycling sock,Wool fibers inherently manage moisture to keep your feet cool & dry in the summer and warm & dry in the winter,Wool fibers inherently manage moisture to keep your feet cool & dry in the summer and warmer in cold weather,Made from US merino wool,Machine wash cool, tumble dry low. No bleach, softener, or harsh detergents.,61% Merino Wool, 37% Nylon, 2% Lycra.