The Darn Solid crew sock combines the legendary Darn Toughness and classic styling to go way beyond the expectations of an "everyday sock". This sock is made of Merino wool for breathability and delivers comfort for all-season. The fine gauge knitting makes you comfortable that you'll forget they're on. These socks come with a lifetime guarantee from Darn Tough as usual. The undetectable seam gives a smooth and invisible feel.