This is extremely important; do NOT wear a helmet. Only three types of people wear a helmet on a bike in Holland:
The mentally afflicted.
The English and Americans wear helmets because in their worlds common sense no longer rules and people must be safe from their own actions at all times. Also it is a well known fact that when Americans fall off a bike they fall on their heads, why this should be we do not know. God gave us each an ass, he appears to have given many Americans more than one ass and yet they do not use them, you have to wonder why. On the rare occasion a Dutchman comes off their bike we fall on our well padded behinds (and it’s ALWAYS the fault of a German motorist).