I drove my trad today.
Varied the speed to see what effect there was on airflow.
Going faster did not send the slipstream over the top.
Sidescreens were on but no headrest.
On the top of my head and neck i could feel the wind, more so at speed.
The headrest stops some of the wind on my neck but not a great deal.
So.......hat,scarf or collar up seems to be the answer.
If I wanted draught free driving I would use a tintop.....
