- extended Dual chinstrap for Petzl Vertex and Strato helmets (4/2019 versions)
- replaces the standard chinstrap
- allows the worker to modify chinstrap strength in order to adapt the helmet to different environments: work at height (EN 12492) or on the ground (EN 397)
Note! compatible only with Petzl Vertex and Strato helmet versions starting in 4/2019.
