RG> I've also heard that some bike helmets are suppose to be cooler than 
 RG> not having one. I find that difficult to believe. There are helmets 
 RG> that have lots of vents and these are usually the more expensive 
 RG> ones. I imagine that air must pass more freely than with less vents.
Properly designed vents will direct the air, kind of like the way an 
aircraft wing does, speeding it up through a venturi effect. 
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 * Freddie 1.2.5 *  Despite the high cost of living, it remains popular.
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