Spotted this on a listing for some HD545s. A small plastic enclosure secured to each earpad with a metal hook, and long cable with Sennheiser plugs. Does anyone know what they are?

I couldn't help but notice that we have lost the custom smilies after the server crash (which no doubt we'll get back eventually) but i was bored so i took the opportunity to make some smilies for the collection A900: A900ti: AD700: W5000: I made a Beyer DT770pro too but...

Has anyone here tried it? I was bored today and decided to rip up the pleather on my old A900 pads, exposing the soft material underneath, which was interesting as on one pad it came off fine, and on the other the plastic was well and truely glued and i couldn't get it off! AT must have...