The endura fs260 pro oversock is constructed by a one piece breathable knit construction with reinforced cleat acess and uses a nylon yarn for an increased durability the endura oversock has a high stretch aerodynamic fit which moulds around the shape of your shoe protecting it from dirt mud and wind endura fs260 pro oversock features protection from dirt mud and wind high stretch aerodynamic fit that moulds to your shoe nylon yarn for increased durability one piece breathable knit c