The Kask Superplasma AQ is a comfortable work helmet that can be used for work at heights as well as for jobs on the ground. The Superplasma is fully adjustable with a head circumference range of 51 to 63 cm. In addition, the helmet features no fewer than 10 vents that enhance breathability. Accessories: The Superplasma can easily be customized with various accessories. For example, the helmet can be equipped with a visor, hearing protection, and/or a headlamp.