Vital Salveo -Thin Athletic Crew Socks Cotton 25%Nylon(Ge) 5%Polyester(BC) 22%Polyester(Normal) 24%Antibacterial fiber 7%Nylon 3%Lycra Spandex 14% Special Design -- Using bamboo charcoal material with antibacterial yarn to prevent the growing bacteria. Enhance Performance -- High-density weaving with superior softness, comfort and perfect feeling for your feet. Improve Circulation -- Bamboo charcoal yarn and appropriate compression promotes blood circulation, reduce muscle fatigue during sports and long periods on your feet. Extremely Breathable--Mesh ventilation on the instep let your feet breathe and dissipate heat.