For optimal ergonomics and safety in the forest. UltraVision mask for better visibility. 6-point headband for comfort and less pressure on the head. Comfortable and adjustable earmuffs. Helmet meets safety requirements EN 397 / ANSI Z89.1-2009 Class G, E and earmuffs meet safety requirements EN 352-3 SNR = 26 dB (A) / ANSI S3.19-1974 NRR = 24 dB (A ).