I've been seeing this guy in his +Honda S2000 at least once a week for more than 2 years and I'm pretty sure I've never seen him with the top up. I'm a firm believer that if you are going to drive a convertible it should be driven with the top down whenever it's not raining or snowing and if you are worried about your hair you should drive something else. However I'm pretty sure I would probably keep the top up at 70 mph when it's 15 deg F. More power to this guy