To round off our full-body outfit system for winter, we have developed the Winter Robo Foil from a slightly thicker fabric than the Spring / Fall version for better insulation and protection from icy air. WHEN / HOW TO USE IT Wear the Robo Foil directly under your helmet in winter. The side sections can be pulled over your upper ears and thus provide additional protection. In rainy weather, the Robo Foil can be combined with a rain cap and offers even greater thermal protection. FINER DETAILS FEATURED FABRICS The yarn mix of polypropylene and elastane, which is tailored to the winter, is ideally suited to wick away excess moisture from the skin and to keep your head warm and dry. CONSTRUCTION / FIT As with the other accessories in the Skin Layer collection, our circular seamless technology is used, free of side seams and with a velvety feel on the head. ENGINEERING - Circular Seamless: A tubular knitted design without side seams, which makes it particularly soft and comfortable to wear on the head.