Smartwool Classic Hike socks are getting upgraded and it starts with recycled nylon.  Merino wool hiking socks are now made more sustainably than ever before. Light cushioning on the bottom of the sock and ZQ-certified Merino wool offers comfort and natural performance benefits that help take care of your feet on every hike. With new patterns and the same all-day comfort, these oldest (and best) women's Merino hike sock may be your new favourite.Sock Height: CrewSmartwool's first sock construction, only now featuring recycled nylon (content varies by style)Elasticised arch brace for secure fitFlat knit toe seam for additional comfortKnit in USA of Imported Yarn: 56% Merino Wool, 11% Nylon, 31% Recycled Nylon, 2% ElastaneStyle: SW001632Light CushionCushioning on the entire bottom of the foot.Made in the USAVirtually Seamless™ ToeSmoothed out toe seams for ultimate in-shoe fit and comfort Small - UK2-4.5/EU34-37 Medium - UK5-7.5/EU38-41