Sockwell Women's Navigator Stripe Micro Socks 32% Merino Wool, 32% Stretch Nylon, 31% Bamboo Rayon, 5% Spandex Made in US Ultra flat toe seam for superior in shoe comfort Spandex throughout the sock prevents slippage and ensures a snappy fit throughout the day Light cushioned sole added for comfort Turn welt top helps keeps the sock in place Y Heel shape design for better fit