Over 25 years ago, Smartwool invented the original Merino wool performance sock—the Classic Hike. The Classic Hike remains mostly unchanged and certainly unmatched in comfort. But today, it’s getting upgraded. And that upgrade starts with recycled nylon—creating a more sustainable (but just as comfortable) sock. They’re also made with responsibly sourced, ZQ-certified wool that was grown with a focus on ensuring environmental, social, and economic sustainability while also taking the best care of our Merino sheep. This is a cozy, capable classic that is never going out of style. Features- Our first sock construction, only now featuring recycled nylon (content varies by style) Elasticized arch brace for a secure fit Flat knit toe seam for additional comfort Country of Manufacture: Italy Composition - 65% Merino Wool, 34% Nylon, 1% Elastane Size guide M (UK 5-7.5) L (UK 8-10.5) XL (UK 11-13.5). Made with responsibly sourced, ZQ-certified wool that was grown with a focus on ensuring environmental, social, and economic sustainability while also taking the best care of our Merino sheep. Light cushioned - for impact absorption and warmth Features recycled nylon (content varies by style) Elasticated arch brace - for secure fit Flat knit toe seam - for additional comfort Fabric: 69% Merino Wool 8% Nylon 22% Recycled Nylon 1% Elastane. The Classic Hike Mens Light Cushion Crew Socks are perfect for your hiking adventures. The socks are for people who prefer Light padding in their shoes or boots. The cosy socks are made from merino wool and recycled nylon.