SMARTWOOL PHD RUN LIGHT ELITE MICRO SOCK - MEN'S Our best fitting, most advanced run socks 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, men's-specific mesh ventilation zones and a Virtually Seamless(TM) toe.FEATURES4 Degree(TM) Elite Fit SystemFor a dialed, performance-oriented fit with flex zone at ankle jointIndestructawool(TM)Indestructawool(TM) technology features a patent-pending construction method for exceptional durability and comfortLight Elite CushionTargeted cushioning designed to provide comfort and protect without adding bulkMade In The USAMesh VentingMesh ventilation zones provide optimum moisture management and maximum breathabilityPhD(R)Built for Performance in the Highest DegreeVirtually Seamless(TM) ToeSmoothed out toe seams for ultimate in-shoe fit and comfortTECH SPECSSock Height: MicroVirtually Seamless(TM) toe for enhanced comfortAchilles tab designed to prevent sock from slipping down into footwearMade in USA of Imported Yarn: 56% Merino Wool, 41% Nylon, 3% Elastane