Petzl Boreo Helmet Adults The Petzl Boreo Helmet is designed to provide reinforced protection for climbing and mountaineering. The outer shell is impact and scratch resistant, designed to protect the top and sides, with an EPP and EPS foam liner to ensure a compact cushioning. > Climbing helmet > Top and side protection > Durable and versatile > Outer shell is impact and scratch resistant (durability) > EPP and EPS foam liners (compact cushioning) > Reinforced protection for climbing and mountaineering > Adjustable clip fastening (under chin) > Petzl branding