Originally Posted by
Retro Grouch
This topic comes up often enough that it would be interesting if somebody would do some controlled testing to determine if color, for example, really makes any internal difference in a bike helmet.
My ibs told me years ago a study showed no difference in the heat wearing a black vs. white helmet, due to the styrofoam like substance working to insulate any transfer of heat. That is also why those ventilation vents are so important.