Smartwool Classic Edition Zero Cushion Hiking Liner Crew Socks - The Classic Hike Zero Cushion Liner Crew hearkens back to the original construction but adds in recycled nylon for strength and durability while reducing environmental impact. Crew sock height Elasticized arch brace for secure fit Flat knit toe seam for additional comfort 59% Merino Wool 8% Nylon 30% Recycled Nylon 2% Elastane 1% Polyester Style: SW001650