Copper Fit socks are manufactured with copper ions bound at the fiber level during the manufacturing process. The copper fiber process will not easily wash out or quickly wear away, and has been tested to remain effective for numerous washes. With the wicking power of wool socks, prepare for your best run, game or practice yet with the Copper Fit sport crew socks. These socks are crafted with high-density activated copper that is woven into polyester yarns for total comfort and premium performance. Copper fibers deliver natural odor management so your feet feel fresh even when you're working up a sweat. Crew cut height is perfect for wearing with sneakers, while soft fibers add comfort with every wear.