Bests & Worsts Reviews from Amazon

I researched a bit before purchasing these. I have ordered several other brands and all were satisfactory, but I wanted something that had the emergency FDA approval. I deflnitely find that the fit of this style is my favorite. However, after wearing the mask for about 15-20 minutes I became severely nauseated. When I thought I might vomit, I removed the mask and ate some yoghurt. Slowly I began to feel better. I did not want to try another mask, so I retruned them. Perhaps if I aired them out before wearing it would have been okay, but I just wasn't willing to put another one over my mouth after the reaction I had. It was very concerning to me.