Product OverviewDetails: Merino wool/nylon blend is itch-free and maintains durability for the lifetime of the socks. Excellent stretch and recovery. Low-cut anklet with roll-top Achilles tab to protect from abrasion. Shaped cushioning in the footbed for extra comfort over long mileage. Mesh-arch brace provides subtle support for a snug fit. Looped Lintoe construction creates the smallest and flattest seam possible for ultimate comfort. 70 g (2.5 oz) Made in USA.SKU: PAT-50040Please note, we can not ship Patagonia outside of the United States.Fabric & CareFabric:Solids: 53% Merino Wool, 46% Nylon, and 1% Spandex.