RedMax helmet system. The helmet shell is a tough HDPE material. 4 Point textile susspension with slip ratchet adjustment in the back to tighten or loosen around your head that also comes with an adjustable 3 depth settings on how it sits on your head. Chamlon™ sweatband provides maximum sweat absorption. Meets and Exceeds ISEA / ANSI Z89.1-2014 Type I with Electrical Insulation – Class E rated. The wire gauze meash visor meets ANSI Z87.1-2010 and can be raised up and down. The helmet mounted ear muffs meets ANSI S3.19-1974, NRR 24dB. Th ear muffs have large cups protect against high noise levels and the soft cushions provide comfort for long use. The spring loaded arms on the ear muffs give an excellent fit to the ear.