Pros: Great seal, works at all altitude and temperatures
Cons: None
"There are a lot of CPR masks on the market, I have carried this one for a long time because the mask is soft vinyl, and inflates = doesn't pop at altitude, seals well even in the cold, and packs smaller. You can get cheaper masks which work ok, but if you are really using this mask for CPR or rescue breathing, you will be thankful you paid the extra couple dollars for an easy seal, and knowing that it isn't going to pop."