1 Pair Pack. 70% Merino Xtreme Wool, 27% Nylon, 3% Spandex. Lightweight wool for year-round wear. Naturally moisture wicking comfort. Naturally odor resistant wool. Half cushion comfort. Embedded arch support fights against foot fatigue. Overfoot ventilation panels increase breathability. Reinforced heel and toe maximize protection. Smooth toe seams provide all day comfort. Ribbed stay-up top for a secure, comfortable fit. Mid calf fit. Made in the USA.