Equipped with the long-lasting durability of WOW Technology, the reinforced soles, light half-cushion insteps and elasticized arch braces deliver maximum comfort over rugged terrain. Advanced Smartwool technology uses the natural properties of merino wool to produce soft, itch-free socks. Whether its hot or cold, the natural crimp of the merino wool fiber pockets let the fabric regulate your temperature. 3x1 rib-knit tops keep socks from slipping down. Flat-knit toe seams. 67% Merino Wool, 32% Nylon, 1% Elastane. Performance socks born in Colorado, Made in America, using the finest merino from around the world. Womens sizes: M-L. Color: Light Gray. Type: Socks.