 Complete the following phrase:  Schumacher, in conjunction with Schuberth, helped develop the first lightweight carbon helmet. In 2004, a prototype was publicly tested by being driven over by a tank; it survived intact. The helmet kept the driver cool by funneling directed airflow through fifty holes. Schumachers original helmet sported the colours of the German flag and his sponsors decals. On the top was a blue circle with white astroids. From the 2000 Monaco Grand Prix, in order to differentiate his colours from his new teammate Rubens Barrichellowhose helmet was predomitly white with a blue circle on top and a red ellipsis surrounding the visorSchumacher changed the upper blue colour and some of the white areas to red. For the 2006 Brazilian Grand Prix, he wore an all-red helmet that included the names of his ninety-one Grand Prix victories. At the 