Smartwool invented the first Merino wool performance sock, but will never stop trying to make it better. These Classic Hike socks are getting upgraded and it starts with recycled nylon. The first-ever Merino wool hiking socks are now made more sustainably than ever before. Light cushioning on the bottom of the sock and responsibly sourced, ZQ-certified Merino wool offers comfort and natural performance benefits that help take care of your feet on every hike. With a new mountain pattern and the same all-day comfort, our oldest (and best) Merino hike sock may be your new favourite. Light Cushion: Cushioning on the entire bottom of the foot.Sock Height: CrewFlat knit toe seam for additional comfortElasticised arch brace for secure fitThe original Smartwool sock construction, only now featuring recycled nylon (content varies by style)Made in USA of Imported Yarn: 56% Merino Wool, 11% Nylon, 31% Recycled Nylon, 2% ElastaneStyle: SW001644CareMachine Wash Warm Gentle Cycle.Do Not BleachDo Not IronDo Not Dry Clean   Large - UK8-10.5/EU42-45 X Large - UK11-13.5/EU46-49