When I was 4 yrs old, my nose was broken. thej as an adult, I've had two operations to remove nasal polyps. I always use a clip. I use the large size for sync swimming. It works really well. I have polyps right now but they are kept small becuse I'm not blowing out through my nose. The other kind with the strap don't seem to fit my nose.
I order 12 at a time because of th ediscount at Kiefer's and because I lose them easily.