Just got thinking after reading that other thread about goggles, I'd love to know if anyone wears goggles over specs and has managed to get over the problem of the glasses steaming up under the goggles?
This applies to skiing etc as well as MTB, I simply can't wear goggles due to this problem which makes a lot of sports a bit awkward.
Ive done it & not really had a problem but due to the goggles not sitting well with my helmet I've only done it on short blasts
I have some RX inserts which fir my bike and snowboard goggles - I hardly ever wear them on the bike though - they just get too sweaty / don't get the airflow and refuse to stay clear of mist.
They're okay in the winter unless it's a really muggy day or I leave them sat on the front of my beanie/helmet when I'm on a lift.