[cardinalfang]

An airbag helmet full of electronics would allow traditional dress, but I don't know enough theology to make the decision.

[usrusr]

The only company that made them has gone bankrupt, so there's that.

They were successful in Copenhagen, where helmet-wearing is not quite as exotic as in the Netherlands, but apparently one city is not enough.

[ndsipa_pomu]

I half-considered getting one of those (I'm in the UK), but the initial cost was expensive and they were single-use as in they needed to go back to the manufacturer to be reset after being triggered which was an additional cost.

https://www.hovding.com/