Product OverviewPatagonia Ultra Lightweight Merino Run Quarter Socks Details: Merino wool/nylon blend is itch-free and maintains durability for the lifetime of the socks. Excellent stretch and recovery. Quarter length to protect against debris entering the sock. Mesh-arch brace provides subtle support for a snug fit. Looped Lintoe construction creates the smallest and flattest seam possible for ultimate comfort. Uncushioned for warmer conditions and closer fitting shoes. 48 g (1.7 oz) Made in USA.SKU: PAT-50000Please note, we can not ship Patagonia outside of the United States.Fabric & CareFabric:51% Merino Wool, 46% Nylon, and 3% Spandex.