isolation 4/5? you have to be joking ..

@turgid: Why? It's all relative. Having owned a few myself, I'd rate CIEM's a solid 5/5, not universals.

with shure olives i found the isolation to be near as good as the er 4s level ...and i dont think unless you own a silicon body custom you can have better isolation .. just my point of view though i've not experienced customs ..