Duplicate post:
One thing I learned when working at the dealership is some of the more expensive helmets will make their shells to fit only 2 sizes of foam. So say xs/s, another for m/l and then another for xl/xxl. And then you get the Arias who each helmet is it's true size.
Then some of the cheaper helmets will use the same shell for all sizes and just use varying thicknesses of liner to make the "size".
At the time I was like "so??" hahaha I have been paying attention to how helmets fit people and paying attention to how well their goggles fit to. What I seem to be finding is that some of the less expensive helmets on smaller heads hold the goggles further off the face (due to thicker padding) and allow more fogging!!!
Now, like I said, this is an observation. We'll be putting it to the test soon, one of the guys that has this "thick foam" issue is buying a new helmet with this in mind to see if it could be truly the problem. Guinee pig.
While they are still dot and snell approved and that extra foam feels good (but will also fail faster in the long run) this might be something extra to look at.
And I already had 3 pairs of Scott goggles and knew I wanted a new 661 mountain bike helmet (mx style, good safety rating and LIGHT) so I took my goggles with me to the store to try my helmet on. GREAT fit.
I carry 2 sets of Scotts on the hill, amber and rose colors for varying conditions.