Farm to Feet Men's King Ultra-Lightweight Crew Socks 71% Merino Wool 26% Nylon 3% Spandex Made in US Merino wool is soft, itch-free, naturally odor and bacteria resistant, cool in the summer and warm in winter Advanced knitting techniques create a totally flat connection in the toe box, reducing bulk and eliminating blister-generating friction 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