soundcore Space 2 | Comfortable Noise Cancelling Headphones with All-Day Wearing

So, i bought these headphones owning the sport X20. So i know a little about the cie. They are pretty good for the price. So i bought these for listening to music while i study. I keep the sound pretty low, enough for a background effect style if i must. The problem is that the reviews on Youtube never test for a low level of music. And there was a big problem for me. The ANC could be heard working in the back. If you cut the music or kept it low, you could hear a woosh effect going on in the back. I suppose that was the ANC working. The good part now: i contact Soundcore, they kind of worked on the problem and ask me to wait a week so they can release to me a firmware update. So they did and it corrected the problem. I'm not sure why is the update only for my headphone (they needed my serial number). So i doesn't seem to be a main update. Anyway, now it's working pretty good, sound is very good and very confortable to study with. The only thing that's left is that ANC is still working if the outside of the headset is block, like if you put your head on a pillow. You will start to hear that woosh sound .