Description One of our best fitting, most advanced running socks for men yet. We packed years of testing, prototypes and running smarts into these socks. Featuring Light Elite cushioning in the ball and heel of the foot for ultimate shock absorption with minimal in-shoe volume, body-mapped mesh ventilation zones, and a Virtually Seamless™ toe, this wool sock has it all and more. Benefits PhD® Built for Performance in the Highest Degree 4 Degree™ Elite Fit System For a dialed, performance-oriented fit with flex zone at ankle joint Indestructawool™ Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort Mesh Venting Mesh ventilation zones provide optimum moisture management and maximum breathability Light Elite Cushioning Maximum impact protection with targeted cushioning on the ball and heel of the foot. Designed specifically for runners. Features Sock Height: Micro Virtually Seamless™ toe for enhanced comfort Achilles tab designed to prevent sock from slipping down into footwear Made in USA of Imported Yarn: 56% Merino Wool, 41% Nylon, 3% Elastane Care Machine Wash Warm, Wash Inside Out. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.