I actually like
these banded foam ear-plugs made by Howard Leight. I've used HL earplugs forever. These plugs work well (almost too well; drinking and chewing are annoyingly loud when I have them in) and I find them very comfortable.
I like these for three reasons: 1) they provide good hearing protection, 2) they're cheap enough that I can have a pair hanging next to
every tool that needs them, and 3) the place where I take metal working classes hands out plugs that are compatible with these bands for free! Not that I really need many replacement plugs, since each band comes with two sets, but it's nice anyway.
When I had a single pair of ear muffs, I'd use them for everything and leave them lying all over the place. I usually spent as much time trying to track them down as I did using the tool that needed hearing projection. Now, I have a pair with the circular saw, the dry-cut saw, the miter saw, the sawzall, both routers, the grinder, the biscuit joiner, etc.