An adventure outdoors shouldn't require compromises, especially where strength and comfort are concerned. SmartWool(R)'s PhD socks pack as much durability as possible into a streamlined package: Indestructawool(TM) technology makes this one of the toughest pairs out there, but it's balanced out with mesh venting for more breathability and a Virtually Seamless(TM) toe for a natural, chafe-free fit. Just pull these on, lace up your hiking boots, and be ready to focus on the journey ahead. . Made out of a 56% merino wool/41% nylon/3% elastane blend. . 8.5 in. crew style. . With a Virtually Seamless(TM) toe. . PhD(R) design enhances performance. . 4 Degree Elite Fit adds two elastics for more stretch and recovery, while keeping your foot in place. . Indestructawool(TM) uses a patent-pending construction to elevate durability and comfort. . Mesh venting helps with moisture management and improves breathability. . Light cushioning keeps your feet comfortable on a range of trail and road terrains. . Made in USA. .