They do keep your nose and mouth warm.

Mask does not fit snug to face, even with adjustable nose bridge

Most of them get wet from condensation and then impede our breathing and start to tickle your nose

Talking in the masks will guarantee the mask to immediately begin its descent, rendering the point of the mask (to cover the nose and mouth) useless.

Just like other KN95s, these work well to prevent glasses from fogging up if you fit the metal nose piece well to the bridge of your nose

The metal strip for sealing the nose works very well

Adjustable nose piece barely effective

there is a nose adjustment that I like.

I have a round and full face (which isn't all that small since I put on some weight a few years ago), and these masks keep moving around and sliding down my nose, even when I pinch the nose clip as tight as possible.