10% of sales of Bee Keeper Socks donated to Pollinator Partnership Bigger than Bees Program. More than 200,000 species of pollinators are critical to the growth of our food supply. Without them, we would go hungry as they bring us 1 out of every 3 bites of food. Size 10-13 W; 8-12 M. 74.6% ORGANIC COTTON/23.4% NYLON, 2% SPANDEX. MACHINE WASH WARM, MEDIUM DRY.