DescriptionPerfect fit. Powerful durability. That's what you get when you put on our Hike Light socks—formerly known as PhD® Outdoor. Featuring our top sock technologies, dialed-in fit systems, updated mesh zones, and extended durability zones, we've upgraded these hiking socks to help you push any summit or enjoy any trail in absolute comfort. Light cushioning on the entire bottom of the foot to bring more comfort to your favorite low-cut hiking shoes. And the addition of recycled nylon makes for a more sustainable sock construction. Go farther in ZQ-certified Merino wool hike socks.4 Degree™ Elite Fit SystemFor a dialed, performance-oriented fit with flex zone at ankle jointLight CushionCushioning on the entire bottom of the foot.Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfortMade In The USAVirtually Seamless™ ToeSmoothed out toe seams for ultimate in-shoe fit and comfortFeatures Sock Height: Ankle Indestructawool™ technology with extended durability zones 4 Degree™ elite fit system for a dialed-in, performance-oriented fit Additional body-mapped mesh zones for added breathability Virtually Seamless™ toe for enhanced comfort Comfort welt with 'stay put' fit CareMachine Wash Warm, Inside OutDo Not BleachTumble Dry LowDo Not IronDo Not Dry Clean   SW001611 Smartwool Men's Hike Light Cushion Ankle Socks (Medium Grey)