SOLD IN A PACK OF 3 PAIRS. Darn Tough Women's Light Hiker Micro Crew sock is a fast, breathable hiking sock that doesn't skimp on comfort or durability. Lightweight cushion density under the foot pads impact on the trail while keeping the sock nimble underfoot, and mesh panels across the top of the foot add cool, targeted breathability. Extended cushion over the Achilles prevents hot spots, and a smooth ribbing upper stays put all day. Fine-gauge Merino wool wicks moisture, regulates temperature and resists odor. 59% Merino Wool / 39% Nylon / 2% Lycra Spandex