I saw these custom ear plugs while I was shopping; what’s cool about it is that they actually do it themselves, you can choose from a variety of colors and they just make it right away. Here’s what they do they have this clay like thingy fitted in your ear and then they wait for ten minutes to dry them and once removed an earplug that shaped like your ear canal is made.
Moulded earplugs are good for musicians as well at concert goers who wanted to protect their ears from noise that could hurt their ears from high frequency sounds. These earplugs can also minimize the background noise hence you will hear more of the music clearly. It was so cool that I lined up to get my earplugs customized