Review (2/5): Small, Moist
These do a good job of keeping my face mask away from my mouth, but they're very small for an "adult" size. They just barely cover my nose and mouth. Occasionally they'll ride up my lip when I'm running and I'll have to stop to reposition the bracket.
The other downside is they collect condensation, even when I'm not exercising. Now that the weather is getting colder, it's very noticable when condensation is collecting in the bracket.