Petzl Vertex Best HelmetProduct Description The VERTEX BEST helmet sets the standard in head protection for workers at height. It's unventilated shell ensures protection against electrical risks and molten metal splash. The six point mesh headband ensures comfort, and its Center Fit adjustment system adjusts the headband and keeps it centred on the head. A six point webbing suspension system conforms to the shape of the head for improved comfort. Shock absorption is achieved