Sockwell Women's Sedona Ultra Light Micro Socks 44% Nylon/38% Lambswool/13% Alpaca/5% 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 Alpaca and wool yarns provide unmatched natural thermoregulation and moisture management