Nick
As the radio in a Roadster above 40mph is uesless I use an iPod and in cool weather wear a sheepskin flying helemet over the top of a baseball cap

As driving a Morgan with the top down in cold weather grants automatic entry to the 'mad' crowd as determined by most folks the flying helmet helps to confirm that view.

the upside is its is VERY warm with the back down

Sorry to say it but the wind break is so Audi TT/ BMW Z3

Andy