I just picked up a pair of these, apparently oakley knockoffs, for 'free' plus S/H.
https://www.bikemethod.com/products/...nt=27955789699
Got them in the mail last night, they're bigger and chunkier than I expected, but not cumbersome on the face, the rubber nose piece holds ok. I have a pretty big face, so the size works for me.
Like many other sunglasses, the bottom left rubs on my cheek, I think it's because my nose is crooked from being broken in high school. So that's a tiny bit annoying but probably not a problem for most people.
The biggest problem is those "O" shapes at the hinge on each side, are persistently visible in my peripheral vision. I don't plan to wear them on the road anymore because I kept thinking a car was sneaking up on me. For mtn they'll probably be good though.