I agree the headrests are nowhere near your head under normal circumstances but would come into play to limit whiplash in a crash. Below is an example from Allon White of neck rolls they offer, as suggested by Jon.

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Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone