The Petzl Sirocco helmet is remarkably lightweight, ideal for extreme climbers and alpinists. It has been designed to provide an exceptional weight-to-protection ratio (170g). It is elongated at the back and provides greater coverage and increased protection all over the head. The brim is bevelled to allow upward visibility when climbing steep slopes. The helmet has a low profile and plenty of ventilation holes, ensuring you are comfortable all day long. The beveled front edge does not obstruct upward vision when climbing steep slopes and offers an unobstructed field of vision. The head strap and chin strap are fully adjustable. Low buckle locks help prevent accidental release of the chin strap. Two front clips and a rear elastic strap for attaching the headlamp.