For a sock that has it all, look no further: the PhD(R) Outdoor Medium Crew offers fit, comfort, and durability wrapped together in one smart sock. Featuring Indestructawool technology for ultimate durability in high-wear areas, the 4 Degree Elite Fit system for a dialed fit, and Smartwool's signature Virtually Seamless(TM) toe for extraordinary comfort in any trail shoe. Medium cushioning provides impact protection and ultimate comfort on the trail. 61% Merino Wool37% Nylon2% Elastane. PhD(R): Built for Performance in the Highest Degree. Women's Specific Fit: Narrower profile provides the perfect women's-specific fit. 4 Degree(TM) Elite Fit System: Uses two elastics for greater stretch and recovery to keep the sock in place. Indestructawool(TM) technology features a patent-pending construction method for exceptional durability and comfort. Women's-specific mesh ventilation zones provide additional breathability and moisture management. Medium cushioning to absorb impact on the trail. Sock Height: Crew. Virtually Seamless(TM) toe. 7.5" overall height. Machine Wash Warm, Wash Inside Out. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean. Made in USA of Imported Yarns.