If you've never driven a convertible car fitted with a windstop you may not appreciate all the hype surrounding this product. By fitting a windstop in the aerodynamically correct position, it is possible to eliminate up to 70% of the back draught which messes up your hair or just blows down the back of your neck. Fitting a windstop will even enable you to enjoy 'topless' motoring on a sunny winters day, due to the reduction of cold air entering the cockpit.