"Absorbent Cotton. Knit in Heel and Toe Eliminates Bunching - Ensures a True Fit. Full Cushion Foot Absorbs Shock and Prevents Foot Fatigue. Proven Antibacterial: Permanently bonded onto every fiber, safely and effectively controls Odor causing Bacteria and other Fungi known to cause Athlete's Foot Fungus on socks. Unlike other treatments in the market, our treatment lasts the life of the sock - really, even repeated laundering won't diminish the effectiveness of our Odor-Eaters Socks. We guarantee it for one full year!!"