Even if they fit perfect in my ears one side of my jaw (not noticable on the outside, but easily noticable in xrays) is different shaped than the other side. If I talk or move my mouth with an ear piece in itll pop loose on the right side every time.
Only way Ive found to get around it is use the armys plugs and the pusher with it gets em in pretty good. (no not far enough to hurt my ear :P )
I wonder if some of you have the same problem, could be why they dont stay in your ears.
(not saying irregularity, just top of your jaw muscle may push up or pull out on your ear canal too much when you open your mouth)
Cant stand using muffs, I wear glasses and it breaks the seal around my ears :(
That being said, I havent had them myself. My friend bought them and its the only pair he will ever need again and they fit perfect. Just make sure if you get them, they fit perfect.