Originally Posted by robelz
I know they race them, but usually with cotton sails due to class rules.
Well it seems that you know more than me regarding that
. Maybe that is some sort oh high quality grade cotton. I had cotton sails and they did not fold like that but they can have some sort of waterproffing treatment that makes them behave differently.
As you know sailmakers can make sails with polyesters that look like traditional sails.
Maybe someone that speaks German can take any doubts about that. I am sure they reefer to that on the movie.