Currently shopping for a helmet. There seems to be lots of conflicting information out there on helmet standards. In particular around the value of Snell approval which puts great importance on puncture resistance which requires a tough outer shell which is of debatable value in a crash. Also there is the Britsh Sharp rating system which rates helmets from 1 to 5. Loved the HJC RPHA 70 only to find it only had a 3/5 Sharp protection rating. The more I read the more it I seem to come to the conclusion most helmet manufacturers build helmets to meet minimal requirements of the helmet standards rather than enhanced safety even in the high end of the price range.