As pioneers in Merino wool performance socks, Smartwool constantly strive to improve. These Classic Hike socks have been revamped with recycled nylon, making them their most sustainable version yet. The bottom of the sock features light cushioning while the Merino wool used is responsibly sourced and ZQ-certified, providing unparalleled comfort and natural performance benefits for your feet on every hike. While retaining the all-day comfort, SmartWool's oldest and best Merino hike sock now comes with a new mountain pattern, possibly becoming your new go-to choice.