Advanced Polycarbonate shell: Lightweight, Superior fit and comfort using advanced CAD technology. "ACS" Advanced Channeling Ventilation System: Full front-to-back airflow flushes heat and humidity up and out. Full front-to-back airflow: 3 intakes and 2 Exhausts. Pinlock Ready HJ-34P Visor: Provides 99% UV protection, Anti-Scratch coated. 10mm enlarged sight of view. Interior provides enhanced moisture wicking and quick drying function.