The Kask Super Plasma Hi-Viz Helmet has been engineered for both professional ground and work-at-height applications. The aluminum grilled air vents on the outer shell prevent debris from entering into the helmet. In addition to the polycarbonate visor and ear muffs, the outer shell is made of High-Density ABS Plastic and designed to withstand significant impact from the top or side. The Kask Super Plasma Hi-Viz Helmet is lightweight, comfortable and features ten air intakes that provide efficient cooling and ventilation. *It can take 3-5 days to install SENA communication. Please be aware that your order may take additional time to ship.