Custom fit Musician Earplugs reduce all frequencies evenly so they avoid the skewed, muffled sound effects common to over the counter earplugs.
The -9dB filter is best for when you want to cut back just a little bit of ambient noise.
The -15dB filter is a good balance between hearing protection and still feeling very “live.”
The -25dB filter is for extremely loud environments. All filters are interchangeable.