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

Those are great for the workshop, but they're flourescent green and pink. That makes it easy to see when someone's wearing them, which is good in a shop but usually bad in social settings.

My issue with foam earplugs is that they're too good at attenuating. I end up wearing them partially inserted, which is ok as long as you're staying still. If you are at a concert, or you're eating, or you have long hair, you'll disturb them.

[1]: https://www.offshorenorge.no/globalassets/dokumenter/drift/s...

It has been a long time since I worked tangentially with frequencies, but IIRC it physically isn't possible to block/dampen all frequencies of sound. Although due to different physical phenomena, this is why everything has a color and nothing is truly black - it is impossible for a material to suck in every wavelength of light.

Here's a publication featuring ear protection products for musicians that attempts to do this. It's not perfect but it's pretty good (I own a set of custom earmolds with the Etymotic filters).