ECCO Men's Ultimate Running Sock 85% Cotton/10% Nylon/5% Spandex Machine Wash These socks are made with the latest technology for running champions. A lightweight, moisture absorbing fiber. It is breathable, washable, and biodegradable. Reinforced heel and toe for extra long wear. Finer fabric due to higher needle count. Reinforced heel and toe for extra long wear, finer fabric due to higher needle count You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!