Optimized comfort with 2 height adjustments.Features - Lightweight high-density polyethylene (HDPE) construction - 6 pt. Rapid Dial ratcheting suspension - 4 external clips to fasten LED lighting systems - Slotted adapters Jackson® hard hat accessories - Built-in chin strap & cup - Replaceable sweatband - Meets ANSI Z89.1, Type 1, Class C, G, E & EN397 European Standards - 1/Each