Suspension system incorporates exclusive patented 3M™ Pressure Diffusion Technology Works with a variety of 3M™ Earmuffs and other accessories 4-point chin strap selector system unique to 3M allows wearer to switch between EN 12492 (helmets for mountaineers) and EN 397 (industrial safety helmets) standards 6-point ratchet suspension allows wearer to customise height and fit with multiple levels of vertical adjustment Inspired by climbing helmets with a brimless design to give you a clear upward view Certified to either EN12492 or EN397 (depending on chin strap configuration) and EN50365 1000 Vac standard 3M™ Uvicator™ sensor disc tells you when your hard hat has been over exposed to UV-radiation and it’s time to replace it DOSH SIRIM Approved