I think the obvious problems is that majority of riders actually have hair and from my experience the chin strap isn’t very very tightly strapped (you want to speak normally I suppose).

Hair gives you considerable slip area making the inner rotational liners redundant or maybe even too much.

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trenchpilgrim a day ago | parent [-]

> from my experience the chin strap isn’t very very tightly strapped

Not on a motorcycle helmet! The double D ring system forces you to cinch it tight, and it does not restrict your jaw or make it hard to talk.

If you are experiencing this your helmet may be the wrong size. Most riders are picking helmets that are far too large.

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jq-r a day ago | parent [-]

I was talking about the bicycle helmets though, I should have been clearer.

	▲	trenchpilgrim a day ago \| parent [-]
		Oh yeah, most bicycle helmets seem to be stuck 20 years in the past. I mostly use MTB or skate helmets instead.