-30 Below OTC Thermal Winter Socks (2 PAIRS) Content- 70% Merino Wool & 30% Nylon Over the Calf - 15" Leg length Pre-Shrunk Merino Wool - We use the best quality wool from Australia for amazing softness and warmth X-Hi Cushion - XHi full terry cushion for added comfort, extra warmth, and protection Made in Canada!