• 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
• 52% nylon, 42% merino wool, 6% spandex
• Made in the U.S.
• Seamless toe construction

This lightweight running sock is made to fit so well you forget it's there — at least until you get another compliment on your style! Arch support, blister protection and that unconditional lifetime guarantee means they will keep your feet comfortable for mile after mile. And the bold pop of colorful stripes just looks cool!