Under Armour Women's Grippy III No Show Socks (2 Pairs) 73% Nylon/24% Polyester/3% Spandex Imported Arm our grip heel prevents sock slippage Arm our dry material wicks moisture, accelerates evaporation Arm our Block technology helps prevent growth of odor-causing bacteria Embedded arch supprt helps reduce foot fatigue True seamless toe delivers superior comfort and reduced irritation