ToeSox Sport Perfdry Medium Weight Ankle Socks 90% Polyester; 10% Spandex Imported Five toe construction promotes circulation, removes moisture (helps fight athlete's foot) and eliminates friction and blisters between toes Cushion sole comforts foot from toe to upper heel Vector heel creates defined heel cup for optimal fit Vented knit top allows for faster cooling Arch band provides gentle pressure to lift and support, Secure welt band keep debris out