@Grigor
I currently use
Howard Leight MAX foam earplugs, which claim a 37dB noise reduction, but I find they are nowhere near as good as the Moldex Rockets earplugs. So don't think those dB figures are accurate.
The Howard Leight MAX earplugs look very similar to your EARSoft FX earplugs. I have tried a number of different foam earplug brands, and they are all roughly the same in their sound reduction abilities.
With foam earplugs, as a test, if I play some loud rock music through my computer speakers, when I put foam earplugs into my ears, they reduce the music volume from 100% down to about 50%. That is to say, the foam earplugs reduce the music volume by about half, but you can still clearly hear the music.
But when I put the Moldex Rockets into my ears, the music volume goes down from 100% to just around 10% — ie, a major reduction, such that you can barely hear the music at all.
Once when I was sleeping during the day, some workmen in the street just outside my bedroom window started using a pneumatic drill (jackhammer) to break up the road surface. There was no way I could sleep through that with my foam earplugs, but as soon as I put the Moldex Rockets into my ears, the pneumatic drill sound became almost inaudible, and I was able to get back to sleep.
With the foam earplugs, I find they are slightly too small to fit my ears, so I have to fold them double, otherwise they will fall out.