Our Classic Hike Full Cushion Crew socks focus on comfort and durability, so you can go farther on every hike. Responsibly sourced, ZQ-certified Merino wool keeps things soft, while recycled nylon keeps it all sustainable. And full cushioning on the entire sock adds the warmth and protection you need and love. Stay cozy out there with our updated Classic Hike socks.. . . . . 4 Degree Elite Fit System: For a dialed, performance-oriented fit with flex zone at ankle joint. Full Cushion: Cushioning on the entire sock for added protection and warmth.. Shred Shield: Shred Shield helps reduce wear from toes. Sock Height: Crew. Our first sock construction, only now featuring recycled nylon (content varies by style). Flat knit toe seam for additional comfort. Elasticized arch brace for secure fit. 56% Merino Wool, 11% Nylon, 31% Recycled Nylon, 2% Elastane. Made in the USA. Machine wash.