Listening to music should be enjoyable and not pose a risk to your hearing. Excessive loud music may lead to irreparable damage to your ears. Pluggerz Custom-Made ER have a flat filter, that does not distort sound and therefore guarantees optimum music quality.
The filters from the ER are changeable to but tend do damage more easily than the Music 2-in-1. The advantage from the ER over the Music 2-in-1 is the fact that they are less visible in your ear.