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The Boreo Caving Helmet has the same design as Petzl's classic climbing helmet, except there are front and rear mounting plates for Petzl's Duo S and Duo Z2 headlamps, making this option much nicer for spelunking and caving. Petzl reinforced the lateral, front, and rear sections for better impact protection. Its hybrid design mixes a hard ABS shell at the crown with EPS and EPP foams around the sides for a more compact fit and a lighter weight.