ULTRA-LIGHTWEIGHT: Weighs only 435g thanks to a hybrid EPP (expanded polypropylene) and EPS (expanded polystyrene) foam liner that absorbs impact without bulk. ELECTRICAL PROTECTION: Unventilated outer shell meets ANSI Z89.1 Type I Class E standards, protecting against electrical hazards, molten metal splash, and flames. DUAL CHINSTRAP: Adjustable chin strap allows you to switch between high strength for work at height (retention) and lower strength for ground work (strangulation prevention). CENTERFIT & FLIP&FIT: Dual side wheels allow for perfect centering on the head, while the headband folds into the shell for compact storage and protection during transport. MODULAR ACCESSORIES: Fully compatible with Petzl accessories including PIXA/DUO headlamps, VIZIR face shields, and standard hearing protection (via side slots).