I think they make a
I think they make a noticeable difference. Comfortable to wear but omg they smell so bad at first, but the benefit to breathing outweighed my dislike of the smell. Hoping it offgases before too long.
Sadly, the size L came out of my nose overnight the first night I wore it and my dog ate it. Womp womp. Using the M now and praying it stays in. I'm so sad, not cheap for immediately losing one.