Smartwool Charley Harper National Park Poster Bird Socks - Past Season 45% Merino Wool/ 53% Nylon/ 2% Elastane Charley Harper Limited Edition: Limited edition styles inspired by the artwork of iconic American artist Charley Harper Ultra Light Cushion: Non-cushioned for maximum performance in close-fitting shoes Virtually Seamless Toe Sock Height: Crew Style: SW000072