I own the comply tips for IEMs and while they are hands down the best for keeping them in my ears, I have my reservations about their durability. If you are someone who pulls earplugs or earbuds in/out a lot, these will wear out very quickly. Ideally you would keep these in for long periods at concerts and it should be much less of a problem than with earbud tips, but it is something to be aware of.