I like Etymotic (https://www.etymotic.com). The design lowers the decibels without affecting the sound too much. I used to play in a band with a drummer who always wore their high-end plugs which you have to have molded to your ear canals, but they also make cheaper standardized ones that do a good job.

Loops are great as a sibling comment mentioned but I had to have very loud dehumidifiers in my house all weekend; I've been walking around with my Sennheiser Momentum True Wireless 3s in transparency mode (i.e. uses microphones to play sound from the outside into the headphone), and it's been amazing. It cut the audio to a maximum level and let me discern conversations more easily than folks not wearing anything.

I have some of these https://www.loopearplugs.com/

They're super comfortable and they don't look weird like the neon yellow foam ones :) Before I always disliked wearing earplugs when I have to at concerts, but the ones from Loop I just wear anywhere I like that is too loud

I like these best for low cost plugs. Howard Leight LL-1 Laser LiteUncorded Foam Earplugs Box, 200 Pair https://a.co/d/3REDT7l

On the cheap, Earasers. They're small enough that they're almost invisible, and they're designed to attenuate roughly evenly across the audible spectrum. That makes them great for concerts, but other folks here claim that the top-heavy attentuation profile of non-music specific earplugs is actually better for speech.

I go to live music a lot so I invested in some custom molded earplugs from 1of1custom.com