Works, but the material is misrepresented.
Definitely NOT silicone.  I snipped a small piece from the bridge of the nose and burned it and it caught fire and melted like hot glue.  Silicone doesn't burn so the listing lied.  Function of the frame is fine.  It doesn't always sit on top of my nose but my main goal was to keep my mask away from my mouth and it does that admirably.
Rating: 4 stars