Carhartt Force Extremes Base Liner Crew Socks Men's lightweight socks built for layering and made with extreme cold in mind. Features: 97% Cocona® / 37.5% polyester / 2% spandex / 1% other fabrics Force Extremes: Our fastest-drying, sweat-wicking gear built for all-day comfort FastDry® with 37.5® Technology makes this our fastest-drying gear 37.5 Technology fibers maintain your body's ideal temperature while attracting and releasing sweat Made in the USA