This product is amazing! My husband is highly allergic to cats and dogs. Whenever we’ve been invited to friends’ homes that have animals he has needed to wear a heavy duty mask. Questions were always asked AND he couldn’t eat dinner at their homes b/c of the mask covering his face. We tried these nasal screens – what a difference they have made in our lives. We recently went to a friend’s home that has 2 large golden retrievers. My husband put the screens on ahead of time and had no problems whatsoever. I could not say enough wonderful things about this amazing product!!