ADVRider.com member S21FOLGORE recently posted up a very informative thread on the popular adventure riding discussion board site detailing ways to deal with helmet “Hot Spots”. His post includes very detailed instructions on how to measure one’s head to determine the shape in a more specific way than simply round, oval, intermediate oval, etc.
He also details the issues with hot spots and demonstrates ways to address them. I am fortunate that my head shape fits in the general mold for most motorcycle helmet brands so I personally have not been affected by these issues. For those of you that do find most helmets uncomfortable to wear for more than 45 minutes or so I highly recommend reviewing the thread.
Even if you don’t have issues it is still an interesting read and the illustrations by the author are quite good. Who knows, perhaps you’ll find that your heads shape is different than you thought and you could end up making your current lid that much more comfy.