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. Fit & Design Elasticized arch brace for secure fit Flat knit toe seam for additional comfort