SmartWool Women's PhD Run Light Elite Kneehigh Socks - Past Season 53% Merino Wool, 44% Nylon, 3% Elastane Knit in USA of Imported Yarn Narrower profile provides perfect women's-specific run fit. Virtually seamless toe - 200 needle construction provides highest knit density while maintaining ultra light weight Sock Height: Over the Calf - 13" overall height Style: SW0SW209