Review (5/5): Has worked perfectly so far for my facemask.
I have a few different types of cloth facemask I wear on the rare occasions I go out these days. I use two of these little strips on either side of my nose to seal the top of the mask down so that I'm not breathing up into my eyes and fogging up my glasses. They work great for this purpose, so I assume they'd work well to keep your boobs in a dress or something like that. I don't have super sensitive skin but haven't experienced any irritation or anything.