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I don't have any specifics on carbon fibre, but from indoorclimbing.com: Fiberglass and polycarbonate composite (which would include carbon fibre) climbing helmets absorb the shock energy by...
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I don't have any specifics on carbon fibre, but from indoorclimbing.com: Fiberglass and polycarbonate composite (which would include carbon fibre) climbing helmets absorb the shock energy by...