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). The Petzl STRATO is an ultra-lightweight safety helmet designed for all-day comfort at height. Unlike traditional hard hats, the STRATO features a dual-part liner made of EPP (expanded polypropylene) and EPS (expanded polystyrene). This hybrid construction drastically reduces weight (only 435g) while providing superior shock absorption. It features the CENTERFIT/FLIP&FIT adjustment system for a secure hold and a DUAL chinstrap that allows the user to switch between "Ground" mode (release 50kg, EN 12492). The unventilated shell offers electrical protection (Class E). Specifications: Certifications: ANSI Z89.1 Type I Class E, CE EN 397, EN 50365 Weight: 435g (Ultra-Light) Liner: EPP + EPS Foam Chinstrap: DUAL (Adjustable Strength) Warranty: 3 Years