Burton Women's Trillium Socks, Canvas, Small/Medium 35% Nylon, 20% Merino Wool, 20% Acrylic, 16% Polypropylene, 7% Nanoglide, 2% Spandex Imported Ergonomic, Articulated Left and Right Motion Fit Midweight cushioning throughout sock Quick-drying and stink-proof polypropylene reinforced footbed Elastic arch and ankle support, chafe-free Link toe seam, sock lock reinforcements, stay high comfort band and dry ride ultra WICK Venting toe panels Midweight sock