Smartwool PhD® Outdoor Medium Hiking Crew For a sock that has it all, look no further: the PhD® 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 our signature Virtually Seamless toe for extraordinary comfort in any trail shoe. Medium cushioning provides impact protection and ultimate comfort on the trail. Features: Sock Height: Crew Body-mapped mesh zones for added breathability Virtually Seamless toe for enhanced comfort 8.5" overall height Made in USA of Imported Yarn: 63% Merino Wool, 35% Nylon, 2% Elastane Style: SW001071 Care: Machine Wash Warm, Wash Inside Out. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.