Thorlo Women's 12 Hour Socks

72% THORLON Acrylic/ 16% Nylon/ 8% Elastic/ 4% Polyester; Color: Black; Ankle Height; Arch And Ankle Compression To Reduce Foot Fatigue; Ventilated; Aerodynamic; Padded Under Ball And Heel For Protection; Made In The USA; Style #WCMU00