Sockwell Women's Zig Zag Fitness Socks 35% Nylon/30% Merino Wool/30% Bamboo Rayon/5% Spandex Made in the USA and Imported 35% Nylon/30% Merino Wool/30% Bamboo Rayon/5% Spandex Fabric Type: 35% Nylon/30% Merino Wool/30% Bamboo Rayon/5% Spandex; Import Designation: USA Turn Welt Top Keeps Your Socks in Place Flat Toe Seam for Comfort Y-Heel Shape keeps Sock in Place Machine wash warm, turn sock inside out Tumble dry low Do not bleach