70% Merino, 28% Nylon & 2% Spandex. Light weight, over-the-calf, unisex sock. An outstanding winter sport sock that helps keep your feet warm and comfortable. Soft merino wool provides itch-free comfort and warmth, moving moisture away naturally. Stretch ribbed leg and welt prevents muscle fatigue and pinching. Special cushioned areas in shin and over the ankle for shock absorption and insulation. Smooth, form-fitting light flat knit provides a "barefoot feel"