Petzl VERTEX BEST ANSI helmet Black A10BNA with a FREE drawstring storage bag Six-point webbing suspension system conforms to the shape of the head for improved comfort. Shock absorption achieved through deformation of the outer shell. CenterFit adjustment system ensures centering and optimal stability of the helmet on the head Chin strap designed to limit risk of losing helmet during a fall (strength greater than 50 daN) The helmet's unventilated shell protects against electrical hazards and molten metal splash