Sack sweat with hard-charging comfort in the Under Armour HeatGear Blitz Sock. The signature HeatGear® construction wicks moisture and accelerates evaporation. Strategic cushioning provides shock protection and space compensation. Embedded arch support reduces foot fatigue while bolstering circulation. The seamless toe and comfort top ensure a comfortable snug fit. ArmourBlock™ helps prevent bacteria growth while ArmourGrip™ prevents sock slippage. Knock out moisture with the Under Armour HeatGear Blitz Sock. 90% polyester/8% nylon/2% Lycra® spandex. Imported. Sz: M=mens 4-8.5, womens 7-10.5; L=mens 9-12.5, womens 11-13.