The heaviest Outdoor Classic crew: more than three-quarters Merino Wool for cold-weather warmth that holds up even when the sock is wet. Fully cushioned foot to reduce impact, reinforced heel and toe for durability, wide band arch compression, and a stay-up comfort top that stays put inside a boot. The comfort toe seam prevents chafing on long days. Built for late-season hiking, working and hunting. Made in Niota, Tennessee.