Earplugs?

My father plays the Galician bagpipes almost every day, and he's getting deafer everyday. I want to buy him some earplugs so he can play without being deaf by the time he's retired. I've seen concert musicians that play the trumpet with something on their ear, but I don't know what brand it is. Please I need recommendations for some good earplugs so I can gift them to him. Thank you very much!!