Motorbike helmet designs tend to cater mostly for male tastes since men form the majority of the motorbiking population. In Indonesia however, where there are thought to be over 80 million motorbikes on the roads, with millions of women riders, helmet designs are emerging to appeal to the vast female biker market.
Cute, cartoon character type designs seem to be particularly popular. I thought this design was quite good, based on the traditional Japanese kokeshi doll.