Smartwool Hike Full Cushion Crew Socks - Men\'s Our Hike Full Cushion Crew socks, formerly PhD® Outdoor, use cushioning on the entire sock to help maximize warmth and protection. These responsibly sourced, ZQ-certified Merino wool hike socks are built with our top sock tech, including Indestructawool™ technology for enhanced durability, our 4 Degree™ Elite Fit System for a dialed-in, performance-oriented fit, and our Virtually Seamless™ toe for maximum in-shoe/boot comfort. We\'ve updated our hike line by improving mesh zones for additional breathability, as well as creating a new ply structure that reduces pilling while enhancing hand-feel and comfort. Not to mention, our best-feeling, best-fitting hiking socks are now made with recycled nylon—making these socks more sustainable than ever. Now that\'s something you can feel good in and about. Features: Sock Height: Crew 4 Degree™ elite fit system for a dialed-in, performance-oriented fit Additional body-mapped mesh zones for added breathability Virtually Seamless™ toe for enhanced comfort Indestructawool™ technology with extended durability zones Comfort welt with \'stay put\' fit Height 8\" / 20.3cm Knit in USA of Imported Yarn: 56% Merino Wool 11% Nylon 31% Recycled Nylon 2% Elastane Style: SW001618 Watch this short video to find our more about the Hike Socks Classic Edition: Technical Features: Indestructawool™ Technology​: Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort. 4 Degree™ Elite Fit System: For a dialed, performance-oriented fit with flex zone at ankle join Virtually Seamless™ Toe: Smoothed out toe seams for ultimate in-shoe fit and comfort Shred Shield​™ Technology​: Shred Shield helps reduce wear from toes Mesh Venting: Mesh ventilation zones provide optimum moisture management and maximum breathability Seamless: Seamless construction provides support with stretch for mobility and comfort Full Cushion: Cushioning on the entire sock for added protection and warmth ​Product Care: Machine Wash Warm, Inside Out Do Not Bleach Tumble Dry Low Do Not Iron Do Not Dry Clean