I’ve been using these for years for concerts, gym classes and always take spares to festivals to give to friends. They are designed for an even 20db cut when listening to music. They have the same fit as the cheaper ER20 but the xs have clearer top end.

I use them 3x a week and have a few pairs. They don’t last forever as the baffles get softer over time. At $40 they last me a year which is pretty good value.