Sockwell Women's Pixelated Socks 35% Stretch Nylon, 30% Merino Wool, 30% Bamboo Rayon, 5% Spandex Made in US Y Heel Shape for Better Fit Turn welt top is a little extra wider to allow for a no-pinch feel and keeps the sock in place Flat Toe Seam helps add Comfort Spandex Throughout the Sock