The Stance Trouble Sock lets you focus on your stride not on your socks The reinforced toe and heel provides maximum durability and the moisture wicking fibers keep moisture moving away from the skin to ensure your feet stay cool dry and comfortable And the anatomical fit cradles the contours of your feet all while preventing sock slippage 45pct nylon / 45pct polyester / 6pct cotton / 4pct spandex Reinforced toe and heel provide maximum durability Air channel cushioning provides ventilation Anatomical fit prevents sock slippage