What helmet do you wear?

I’m interested in what helmet everyone wears. I’m in the process of transforming my 05 road king into a cholo/vicla bike. However, when I ride without my windshield on I get terrible turbulence on the helmet. My head gets thrown all over the place. So, for those of you riding without a windshield and use a helmet which one do you use? Do you get any turbulence?