These environmentally-friendly socks are made with a special yarn spun from recycled plastic water bottles. They are specifically engineered for extreme moisture management. Our DRYALLDAY socks have a faster drying time, superior comfort, and exceptional softness. They have terry on the bottom for cushion while walking, and flat knit on top so they fit well in any shoe you choose. These DRYALLDAY with copper have copper thread knitted in for its antibacterial and anti odor properties.Designed by a podiatrist with comfort and foot health his main concern. Care instructions- Machine wash cool water, tumble dry low.