SW001632 Smartwool Women's Hike Classic Light Cushion Leaf Crew First. Never finished. Smartwool invented the first Merino Wool performance sock, but they will never stop trying to make it better. The Classic Hike socks are getting upgraded and it starts with recycled nylon. Smartwool's first-ever 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, their oldest (and best) women's Merino hike sock may be your new favorite. Height: Crew Cushioning: Light Cushion Smartwool's first sock construction, only now featuring recycled nylon (content varies by style) Elasticized arch brace for secure fit Flat knit toe seam for additional comfort Knit in USA of Imported Yarn Fabric 56% Merino Wool / 31% Recycled Nylon / 11% Nylon / 2% Elastane Specific percentage of Recycled Nylon will vary as Smartwool transitions to 100% Recycled Nylon in future seasons. Product Care Machine Wash Warm, Inside Out Tumble Dry Low Do Not: Dry Clean, Bleach or Iron