Daily-use socks that can be used as liners or on their own, made from a fast-drying recycled polyester/nylon/spandex blend with HeiQ® Pure odor control. Produced at a family-run factory in the United States. The Ultralightweight Liner Socks is fully backed by our Ironclad Guarantee and you can find it on Patagonia.com. | Patagonia Ultralightweight Liner Socks in Birch White, Large - Recycled Polyester/Nylon