Also, some new helmets use the MIPS technology (or similar) which can reduce concussion from the helmet being spun around; common in bike crashes but not addressed at all by CPSC.

Originally Posted by noglider
I believe all helmets sold in the US comply with the same standards, so they are of equal safety. Fit and comfort vary by individual, so your best bet is to try them on in the store to make your choice. Buy from the store where you try them on. It is not nice to try them in the store and then order your choice online.

To say "all the helmets sold in the US comply to the same standards, so they are of equal safety" does not take MIPS into account. The helmets sold here will all protect you to the CPSC level, but those that do not incorporate MIPS may well leave you with a concussion that could have been avoided with MIPS. (I escaped one such concussion with a standard CPSC helmet before I learned of MIPS. My chinstrap was loose. The helmet spun, nearly taking my ear off. When I learned of the MIPS foam helmets designed to do that same slip, I was sold.)

Ben