The endura windchill skullcap is designed to sit snugly underneath your helmet keeping you warm but without overheating the endura cap features flatlock stitching to ensure ultimate comfort along with reflective flash and logo for added visibility made out of thermolitereg with high performance repel teflonreg fabric protector the cap provides ultimate weather comfort with durable water repellent qualities the thermolite material in this cycling skull cap uses hollow core fibre tec