Farm to Feet Women's Spring Creek Ultralight Crew Socks 62% Merino Wool 36% Nylon 2% Spandex Made in US Merino wool is soft, itch-free, naturally odor and bacteria resistant, cool in the summer and warm in winter Circumferential compression from the top through the arch creates a precise, comfortable fit that helps support the foot throughout the day Advanced construction of hidden nylon plaiting creates a smooth exterior and a low-profile fit that is ideal for technical and sport socks Flat knit construction provides better ventilation and reduces bulk for a better fit, while the smooth seamless knit feels wonderful next to the skin Reinforced construction and low-stress seam placement reduce wear and tear, increasing the life of the sock