Sockwell Women's Tapestry Socks 32% Stretch Nylon, 31% Merino Wool, 31% Bamboo Rayon, 6% Spandex Made in US Arch support and spandex throughout ensure an uncompromising fit Seamless toe seam, turn welt top, and Y-heel constructions provide superior comfort Super fine merino wool provides natural thermoregulation and moisture management