Track day helmet?

[Spleen]

First track day in a few weeks and whilst I have a collection of bike helmets, not sure if these can be used? I was going to take my flippy lid Schuberth but not convinced it will pass first muster.

Any suggestions gratefully received, have zero desire to shell out 100s for two or three trackdays a year.

[E-bmw]

Yes, it is acceptable, the great majority use bike helmets.

[Spleen]

Hoofing, thanks.