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Document File (.pdf)
Helmet Types and Safety Information
19-Jan-2014 All-female flat-track roller derby league in Chicago, IL [9456]
• In order to pass the CPSC test a helmet must reduce a 1000 G energy pulse to under 300 G's. A 1000 G energy pulse is equivalent to falling roughly 7 ft. to the ground or a 14 mph impact into a flat surface.
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