RPHA 60 Adventure Helmet. Shell: Premium Integrated Matrix / PIM™: Prepreg is a high-performance material infused with strong epoxy resin and special fiber tissue, widely used in the aircraft industry and racing for its maximum performance and lightweight properties. With PIM (Premium Integrated Matrix) 2nd generation, HJC utilizes its unique technical expertise, gained through continuous research and development, to laminate the shell. This organized structure enhances impact protection while keeping the weight low, providing greater durability in extreme environments and ensuring uniform stability for improved performance. Aerodynamic Design shell reduces air resistance and provides stability at high speed. Wind tunnel-tested. Ventilation: Refine Freshness: Three intakes and four exhausts.