Sockwell Women's San Fran Cable Socks 33% Merino Wool, 33% Bamboo Rayon, 29% Nylon, 5% Spandex Made in US 35% Stretch Nylon/30% Merino Wool/30% Bamboo Rayon/5% Spandex Spandex Throughout prevents slippage and ensures a snappy fit throughout the day Flat Toe Seam Y Heel Shape for Better Fit