Strong to the finish. Darn Tough Popeye Crew delivers legendary Darn Toughness with sophisticated styling. Versatile to the core these socks go way beyond the expectations of an "everyday sock". Fine gauge Merino wool keeps them cool in the summer and warm in the winter. True Seamless construction makes them irresistibly comfortable. Plus they're anti-microbial and breathable so you can wear them more than once while you're traveling and no one will be the wiser. Still made in Vermont. Guaranteed for life. Merino Wool - Darn Tough custom count, shrink treated Merino wool enhances the comfort and durability that outdoor enthusiasts have come to expect from this fiber. True Seamless - Using the latest generation of Italian knitting machines, Darn Tough are able to knit ultra-light yet extremely dense socks with an undetectable toe seam, here in Vermont. The result is miles and miles (and miles) of blister-free bliss. Feel the difference of feeling nothing at all!