We use Shure in ear monitors. There are three of us and we hear just what goes out front. I am deaf in one ear and have a 30% loss in the other. My hearingologist likes the ear monitor because I can control the volume at my belt.

The down is the good ones are expensive.
They eat one 9volt every other job.
The ear buds are around $100.00 to $150.00 to replace when they break and they will.
If you get the buds in your ear a little sideways they muffle a lot.
The slightest cold or bit of earwax in the way creates sounds that you won't believe.

The upside is I hear everything clearly.

I would never go back to a floor monitor or a hot spot on the stand.

Don