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Model is Senheiser Momentum2 HD1 Bluetooth (over ear) PF edition.
I have wrapped electrical tape over it but cables on both sides have started to disintegrate/decompose.
I know next to nothing about audio cables. I care more about functional quality then original looks so i would be willing to swap the entire cable for a more permanent one, but i wouldn't want them to look ugly either and need to find a good way to fit them to the earshell.
I bought a replacement Sennheiser cable off ebay and it even had a mic (new function for me). Then it's pretty easy to solder in yourself if you know what you're doing. Left and right...