While these earplugs are fine, I didn't find them any more effective than many other brands I've used in the past. In fact, they were less effective. I tried them out after reading all the positive reviews here and elsewhere, but will be returning to my previous brand (Flents' Quiet Please).
Despite the Hearos' 33db rating, and me properly inserting them (deeply) in my ear canal (I've slept with earplugs for 10+ years and know how to use them), I could still -- quite clearly -- hear just about everything. Definitely nothing close to "muting." There was perhaps a muffling effect, but that's about it.
That said, they are very soft and very comfortable. Just not exceptionally effective.