Accessories can be used with Ridgeline Cap Style and Full Brim hard hats H2MAX creates a high performing, superior anti-fog coating that is durable enough to withstand repeated cleaning without losing adhesion H2MAX ensures maximum clarity in the most extreme temperature and humidity conditions, and it also adds a layer to the lens that is abrasion, chemical, and UV-resistant One-piece wraparound lens for eye protection Clips to secure the lens accessory into the safety hard hat 5-position length adjustment provides the best fit for all head sizes Optically correct polycarbonate lens with impact resistance against flying particles Filters out 99.9% of all harmful UV light Lens Coating Anti-Fog Lens Material Polycarbonate Lens Thickness 2.3 mm Overall Length 171.5 mm Overall Width 167 mm Standard(s) Met Meets/Exceeds CSA Z94.3/ANSI Z87+