The Petzl Strato work and rescue helmet is light and comfortable, characterized by a two-part inner shell, expanded polypropylene and expanded polystyrene and a closed outer shell, without ventilation openings, designed to guarantee maximum protection against electrical hazards. casting of melting metals and flames. Strato has two super innovative and practical systems: Centerfit and Flip & Fit. Let's see in detail what these two technologies are that you combine togetherguarantee an unbeatable hold. Centerfit adjustment takes place by operating the two side wheels. The system is easy and fast and allows the helmet to always remain well centered on the head. The Flip & Fit system instead allows a low headband position to improve the helmet's hold. The system falls within the helmet to facilitate storage edtransport. Strato has interchangeable foam padding, Dual chinstrap that allows the worker to modify the chinstrap resistance to adapt the helmet to different environments: work at height (EN 12492) and ground work (EN 397), ventilation holes. Modularity is another clever aspect of this helmet, allowing it to adapt to various professional activities. Strato is compatible with various accessories: the visor that you can install using the two special side attachments, headlamp to attach to the four clips, chinstrap and interchangeable padding, hook for ear muffs, neck protector, badge holder. All accessories can be purchased separately. The helmet is available in one size adjustable from 53 to 63 cm. Instructions. Petzl Strato helmet for work at height and rescue