Smartwool Classic Mountaineering Maximum Cushion Crew Socks With full, plush cushioning, the Classic Mountaineering Maximum Cushion Crew is just right for your long-distance and backpacking hikes. Its elasticised arch brace offers a secure, lasting fit, and its flat-knit toe seam helps with in-shoe comfort. Smartwool's thickest, warmest sock, this wool crew helps ensure that your feet stay comfortable, no matter how long the hike. The Classic Mountaineering Maximum Cushion Crew Socks features the Smartwool fit system that provides important ankle and arch braces for a secure fit. Extra-heavy cushioning provides the ultimate impact absorption and warmth for mountaineering expeditions or any cold-weather hikes. The Merino Wool composition provides natural moisture-wicking qualities to help you keep your feet cool, dry and comfortable whether you're on a leisurely Sunday stroll or a backcountry hike in the middle of winter. A flat-knit toe seam prevents any chafing or irritation