Sockwell Men's Diamondback Socks 32% Merino Wool, 32% Bamboo Rayon, 31% Stretch Nylon, 5% Spandex Made in US Flat Toe Seam Turn Welt Top Helps Keeps the Sock in Place Y Heel Shape for Better Fit Light Cushion Sole for All-day Comfort Spandex Throughout the Sock Flat Toe Seam