Smartwool&';s fullest, plushest sock offers maximum cushioning for maximum comfort on long hikes or backpacking trips. Plus, with its stay-put arch brace and comfort-driven toe seam, you won&&';;t notice it&&';;s there. Constructed of responsibly sourced Merino wool blended with recycled nylon, this sock is sustainably durable, to help reduce your environmental footprint. Features Sock Height: Crew Smartwool&';s first sock construction, only now featuring recycled nylon (content varies by style) Elasticized arch brace for secure fit Flat knit toe seam for additional comfort Made in the USA of Imported Yarn: 74% Merino Wool 8% Nylon 17% Recycled Nylon 1% Elastane