«  Nickel! »

I use it for several years (4 or 5) now. I passed by several other headphones not very expensive before, but for a (good) hundred Euros, it is just nickel. A very good sound quality, which does not seem to be too tarnished with time, and very comfortable (compared to my old headphone, Behringer HPS5000, but it was anything but comfortable to wear. ..)
I tried some Sennheiser worth double the price of these headphones, which sounded so good.
Only downside, mosses eventually crumble, and I will have to change. It leaves black spots around the ears