I have never taken my ERA out for a really long drive (meaning over an hour) when it was really cold, although I do have both a soft top and side curtains. I always thought that if for some reason I did go for a road trip when it was in the 30's or so, I would just get one of those heated travel blankets that plug in to your cigar lighter and use that. They actually look pretty snuggly. Mostly, I don't even take her out in the cold, and now I consider cold to be anything below 60 degrees.
