Review (4/5): Works very well. Glasses friendly.
It does fog, but it's just the mask that fogs, it seals close enough to my face that my glasses never fog.
The legs fold, but being rigid means that it's bulky to carry around when I don't need to wear it. The around-the-ear legs keep it securely attached to my face even when I shake my head.
It's a huge improvement over the "face diaper".
Ed B.