The artists, roadies, and techs themselves either use custom molds or Etymonic plugs. I've been buying these for years:

https://smile.amazon.com/dp/B00RM6Q7FC

It also comes with a string to keep them together which is vital for us folks with weird ear canals that reject all ear buds after an hour of use!

IMO most of the earplug landscape is just fancy branding with a lesser product (Vibes and Loop in particular).