I googled it but all I got was forums full of old people talking about hearing aids. I keep seeing everybody wearing these molded plugs with a small hole that has a small cap to plug it. What's up with these? It seems like the serious shooters all use them at matches. I've never tried molded plugs either, regular shove-in-ear plugs bother me because they have to be so deep. It also seems to bother me havin my ears sealed for long durations. Thinking maybe the hole would act like a mini vent? I always see the hole open, nobody ever closes it.
What gives PF?