These Farm to Feet Yadkin Trail socks are a great addition to any outdoor activity. From hiking on the trail to fishing on the lake, these socks are sure to keep you warm during those chilly mornings and cool during those long hikes. With their high-density cushion and mid-calf height for full coverage, you stay comfortable all day long. Medium fits men's shoe size 5-9, women's shoe size 6-10. Large fits men's shoe size 9-12, women's shoe size 10-12. Made from 54% US Repreve Polyester (recycled plastic bottles), 36% US Merino Wool, 9% Nylon, 1% US Lycra Spandex. Machine wash cold, lay flat to dry. Made in the US.