SmartWool Striped Hiking Light Crew - Women's 61% Merino Wool, 38% Nylon, 1% Elastane Made in USA Style: SW0SW143 Knit in USA of Imported Yarn Sizing clearly indicated on the sock - Flat knit toe seam Sock Height: Crew - Elasticized arch brace Light Cushion: The ideal cushion for varied trail and road terrain