Originally Posted by
Telly
I read about the following item in a touring site, and although I think it looks a bit peculiar, it should be excellent for shielding the sun while still wearing a helmet.
http://dabrim.com/
Does it worth $40, though? All you need is to cut off the crown of a wide-brimmed hat (e.g. straw hat) and replace it with your helmet, and you have a home-made one.
I find most such "convenience gadgets" for cycling are way overpriced.