For solo driving, ie without wanting to converse with passenger, this is an interesting hearing protection / music / satnav solution that works well.
These are custom moulded sleeves that slip over your AirPods. They isolate noise well - you can of course pop the AirPods in transparency mode if you want to converse with someone - and they hold your AirPods firmly (I use them with the side panels and roof off at 70 mph).
The supplier books you an appointment at a nearby audiologist to get the moulds made (same process that is used by professional musicians for their in-ear monitors).
https://ultimateear.com/product/custom-apple-airpods
