These Socks are made from Cupron Antifungal Fibers that have EPA Registered fibers which kill 99.9% of Athlete's foot fungus on the sock after 12 hours of contact. The Benefits: Rejuvenates and improves the appearance and texture of skin. Helps prevent and eliminate odor. Cupron anti-fungal fibers are embedded into the fibers of the sock and will not lose efficacy after 20 washes. FastDry technology wicks away sweat. Fights odors. Made in USA. 1 pair per package.