On 3/20/2019 10:40 PM, news18 wrote:

Ignorng the requirement for that 'certification sticker", just how hard
would it be to build your own helmet?

A distorted plastic bowl with a set of straps attached, the linen with a
thick coat of spray foam. it would probably as good as the ones they sell?

Considering that you can buy a certified helmet for as little as $10,
the upside of building your own would be questionable. Also, spray foam
is not the same as EPS.