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Air Permeability (Wind Resistance) Air permeability is a measure of how much air (in volume) is able to move through a fabric, which can also be looked at as wind resistance for rain shells
Below is a cross-reference that can be used to classify a bearing across these three standards
And when you want to change things up, throw it in the wash and start over
The DOT-approved RPHA 1N meets FIM homologation and it is the same model of helmet used by HJCs world-class athletes in MotoGP and WorldSBK
US$ 25.17
US$ 26.29
US$ 24.55
US$ 27.50
US$ 26.59
