I once found this damage on my headphones on both sides, it is unclear what caused it, and the continued uses causes the damage to expand. I’m seriously concerned as I’m sensitive to such issues. The headphones are less than a year old.
Solution: Glasses have been the problem, read one of the many replies below for more details.


i’d see if you can find velour replacement pads. this will reduce the head seal, which will let more sound in and will change the sound signature a little, but it will also last a lot longer for normal day to day use