The Strato Vent work and rescue helmet by Petzl is light and comfortable, characterized by an inner shell structured in two parts, expanded polypropylene and expanded polystyrene, EPP and EPS. Strato Vent 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 Vent 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 Vent 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. The helmet is available in one size adjustable from 53 to 63 cm. Instructions. Petzl Strato Vent helmet for work at height and rescue