Description A true rugged sock in a lighter weight. Don&';t let the "light" in the name fool you; this sock is no lightweight when it comes to comfort, durability and all the heavy-duty work you can throw at it. ?Features Our patented Full Contact FitA(R) hugs the contours of your foot and stays put so there are no loose socks to rub you the wrong way. Full Merino wool cushion under foot with lightweight upper. Excellent thermal insulation and moisture control. Nylon exterior for durability. Crew height rises just below the calf. Merino Wool 62%Nylon 28%Polyester 7%Lycra 3%