Mens 1 Pair X-Socks Run Speed Two Running Socks 20% nylon Features: AirConditioning-Channel, Active-Bund, Robur (TM) heel protector, X- Cross Bandage, ISO Blocker, AirGuide (TM), Air Flow (TM) ankle pads, ToeTip protectors made of Robur (TM), Lambertz-NicholsAchillese tendon protector, instep protector with AirCool Stripes Material 81 % Nylon 43 % SkinNODOR 16 % Polypropylen 20 % Nylon 3 % Elastan 16 % Mythlan(TM) 18 % Robur(TM) 3 % Elastan