The Petzl Boreo Grey Helmet is a durable and versatile headgear designed for climbing, mountaineering, caving, via ferrata, and canyoning. Its hybrid construction combines a thick ABS shell with dual EPP and EPS foam liners, offering a compact yet protective design. The helmet's head-covering shape, lowered at the back, provides enhanced protection against lateral, frontal, and rear impacts, aligning with Petzl's TOP AND SIDE PROTECTION label. Ventilation holes increase air circulation, optimizing comfort during extended use. The flexible headband conforms to the shape of the head and folds into the shell for easy storage and transport. The helmet is compatible with Petzl headlamps, featuring two front clips and a rear elastic band for secure attachment. It is available in two sizes: S/M (48-58 cm) and M/L (53-61 cm), with a weight of 300 g for S/M and 330 g for M/L. The Boreo Grey Helmet is certified to CE EN 12492, UKCA, and UIAA standards and comes with a 3-year warranty.