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.

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[โ€“] 1 point 4 months ago*
  1. A hole
  2. Your ear/glasses
  3. No

Buy a new pair of cups off Amazon or whatever you prefer, they ought to cost you around $5-10. Yours look like the standard egg shape, so just about any should fit. These cups wear out with regular use, which is why they can be removed easily for replacement.

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