• U.S. shoe size: M fits men's 8–9.5 or women's 10–11.5, L fits men's 10–12 or women's 12–14, XL fits men's 12.5–14.5 or women's 14.5–16.5
• 55% merino wool, 42% nylon, 3% spandex
• Made in the U.S.
• Seamless toe construction

Increase your top speeds and let your feet breathe in these high-performance running socks. Darn Tough socks are made in the USA and offer a lifetime guarantee.