Premium merino wool blends with polypropylene and high tech spandex in the CEP Men's Dynamic Plus Run Merino Sock to create a durable, comfortable fabric that's ideal for your most strenuous workouts. With an excellent anatomical fit and an optimal thermal balance for high aerobic athletes, this may become your new favorite sock. Supreme heat and moisture management capabilities meet strategically placed padded zones for the ultimate in comfort. A close fit helps prevent blisters, and the flat toe seam reduces irritation. Antimicrobial properties help to reduce odor.