Ultra-lightweight helmet with enhanced protection for climbing, mountaineering and ski touri Detailed description Ultra-lightweight design:- Perfect for long days at 170 g- Minimalist buckle and adjustable webbing for increased comfort and lighter weight- Hybrid construction with an EPP (expanded polypropylene) foam shell and rigid crown injected with EPS (expanded polystyrene) foam Enhanced protection:- Designed in accordance with Petzl’s TOP AND SIDE PROTECTION label- Designed for optimal protection against impacts to the side, front, and rear of the head Maximum comfort in action:- Open front profile makes the helmet rim invisible to the user and offers an unobstructed field of view- Headband and chinstrap webbing are fully adjustable- Low-profile buckle locks in place to help keep the chinstrap from loosening unintentionally- In addition to ventilation holes, the interior foam and liner feature integrated air channels for better air circulation- Two front clips and rear elastic band for securing a headlamp to the helmet