Kask Super Plasma Hi-Viz HelmetPlasma work helmets were designed for professional applications. They are lightweight, tough, and uber comfortable. Every helmet contains ten aluminum grilled air vents that provide efficient cooling and ventilation while blocking out debris. The rubberized wheel for headband size adjustment is easy to use even while wearing gloves. The high density ABS plastic outer shell is designed to withstand significant impact from above or from the side, and