The Petzl Boreo is built for climbers who move between disciplines: sport routes, trad, via ferrata, canyoneering, and caving. The ABS outer shell and dual-foam liner work together across a full season of use, handling everything from the repeated low-energy knocks of a busy crag to the single high-energy impacts that matter most. Extended rear coverage closes the gap that shorter sport helmets leave exposed, which matters most in environments where rockfall arrives from unpredictable angles. What Our Gearhead(R) Experts Are Saying:"The ABS shell is what makes this helmet worth recommending to anyone who's hard on gear. It takes the pack abuse and the accidental drops without denting the way foam-only lids do, so it's still doing its job when you actually need it."