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.


These being senns, I don’t think they fall into the “cheap crap” category.
Also, replacing the foam is far better than replacing the whole unit. If you have a recommendation for foam pad replacements that will last years, that would be awesome!
Thank you for the response, and I would love to know too. /gen
Last time I had the pads on mine disintegrate, I found some replacements that were made of real leather. I haven’t had to replace them since. Some brands also make fabric pads; I’m sure they probably last longer than polyurethane, but I would expect them to wear out eventually.
I would prefer materials that weren’t sourced from animals (no judgement).