CyanicenineYou aren't suppose to put anything under your helmet. In order for the helmet to function as it was intended it should fit snugly around the entire circumference of your skull. If you have room to fit a beanie, goggle strap, etc, it's probably not a good fit.
Do whatever you want, but that's what the manufacturers say.
How would you not wear a beanie under your helmet? that sounds awful.
I agree to your pint, but wearing a google strap underneath, being that it is tight, I don't believe you are putting yourself at that much more of a risk