Protecting your face from falls

I was just talking about this in another thread. I’m asking Santa Claus for Oakley RadarLock sunglasses. As for a full face helmet, the heat and humidity in Kentucky (which also fogs up cheap sunglasses) would make it very uncomfortable when I ride MUni (slow & stop often) but it might work when touring (fast and never stop) on my geared 36er. I looked into it when I bought my last helmet and decided against FullFace. Then again, I ain’t that pretty. I might revisit the notion when my kids get old enough to ride mountain bikes considering all the $ I’ll have tied up in orthodontia by then.