The Milano Skull Cap is a thin water/wind proof and thermal cap that is designed to be worn under your helmet. First and foremost, and under cap has to be thin, elastic and not bunch under your helmet. The Milano uses low volume fabrics and flat stitching to achieve this. The Capo Element-4 fabric prevents wind and water from penetrating while being breathable at the same time. Thermo Roubaix fleece adds thermal value. Several anatomic panels are sewn together to create the proper fit.