X-Socks Men's Evo Run Sock 49% Polyester 48% Nylon 3% Elastane Imported 49% SkinNODOR, 37 % Nylon, 11% Robur, 3% Elastane Air Conditioning Channel is a system made of finely woven knitmesh that continually circulates air Traverse AirFlow Channel System offers lateral ventilation under the foot Anatomically shaped footbed aligned to both "R"-right and "L"-left foot X-Cross Bandage cushions and stabilizes the sensitive ankle area without restricting freedom of movement