Teko Women's M3RINO.XC Merino Wool Poly Blend Vienna Socks, Brown 35% Merino Wool / 31% Recycled Polyester / 31% Nylon / 3% Elastic Made in US 56% organic merino wool, 41% nylon, 3% Lycra spandex Designed for active lifestyles. Organic, chlorine-free Merino wool is naturally wicking and insulating. Recommended for all weather conditions. Machine Washable Made in the USA