Light, low and ultra-comfortable, these are the perfect hiking socks for the hiker who likes to move fast. Smartwool's innovative technologies ensure longlasting durability and maximum comfort. 56% merino wool, 11% nylon, 31% recycled nylon, 2% elastane. Machine wash and dry. Indestructawool technology with extended durability zones. 4 Degree elite fit system for a dialed-in, performance-oriented fit. Body-mapped mesh zones for excellent breathability. Virtually Seamless toe for chafe-free comfort. Comfort welt with 'stay put' fit that won't slid up or down. Light cushioning on underside of foot brings more comfort to your favorite low-cut hiking shoes. USA.