Antibacterial and therapeutic sock made with X-STATIC? and COOLMAX? fibers. X-STATIC?fiber is made with a pure silver layer which is permanently bounded to the Surface of the fiber. Its is antimicrobial, natural, anti-static and therapeutic. Highly recomended for sensitive skins. COOLMAX? fiber has four longitudinal openings which gives the garment a high level of breathability, while allowing the entry of air keeping the skin always dry.