You can buy custom molded in-ear monitors.
You go to an audiologist.
He makes an impression of your ear.
Send it to the factory.
Wait until they ship your custom-fit IEM.
Oh yeah, you have to pay a substantial amount of money too.
Why not rolling your own!
Take a pair of Sonomax Eers headphones.
Put them in your ears while attached to the thingy below.
Pull the trigger and don’t move your jaw for 5 minutes and you have your custom mold.
Source: eers™ custom fit earphones
