Maybe the gimp coat gives an advantage but I think when it's hot it gives also nuisance .
If someone believes that the discomfort can be compensated by the advantage is good to use it, I prefer to be comfortable.
I suffer more from the heat that a low score.
Then it seems too complicated to determine what is a jacket, 2 normal jackets = 1 gimp jacket?
I believe that in a sport if there are less restrictions better it is.