Suspension system incorporates exclusive patented 3M™ Pressure Diffusion Technology Secure, comfortable head protection against small falling objects and for general industrial use 4-point ratchet suspension allows wearer to customise height and fit with multiple levels of vertical adjustment 3M™ Uvicator™ sensor disc tells you when your hard hat has been over exposed to UV-radiation and it’s time to replace it Certified to EN 397 standard for general industrial use and EN 50365 1000 Vac standard Electrical insulation against 1000 Vac and 440 Vac DOSH SIRIM Approved