Smartwool Classic Edition Light Cushion Hiking Crew Socks - 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. ZQ-certified Wool Light cushion Virtually seamless toe Elasticized arch brace for secure fit Flat knit toe seam for additional comfort 56% Merino Wool, 11% Nylon, 31% Recycled Nylon, 2% Elastane Style: SW012900