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4

Short answer: they're not required to. According to http://www.spkids.com/pages/astm-helmet-safety-standards-explained this standard consists of these tests: Dropped from two meters on flat anvil (iron block); drops from curbstone and hemispheric anvils placed higher than bicycle helmet testing Three anvils mimic various mountain bike terrains for ...


2

I sweat easily and am in shape however I do the following (and this may repeat what others have advised, while the difference is, I do it daily an experience it - I am in Toronto, so the weather is also getting warm): I currently ride in jeans and t-shirts (see below).. I ride where my body temp doesnt get too high...its very tempting to race or keep up ...



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