FoxRiver Kids Snow Day Over-The-Calf Socks 37% Merino Wool, 37% Acrylic, 24% Nylon, 2% Spandex Made in US Made from merino wool Memory knit construction holds form wash after wash Fully thermalined shin, sole and toe absorb shocks and insulate Smooth flat toe seam adds comfort and durability Medium weight Made from merino wool