I bought a set of Sennheiser PXC 450 headphones in 2007. Love them. They are noise cancelling. When the noise cancelling is on the ambient noise in environment just disappears. Eight years is a long time and I noticed recently that the leatherette covers on the ear pads was deteriorating and starting to flake. So I ordered a new pair of official replacements. They were expensive but well worth it. Came with the fitting rings that hold them on already fitted. So they just snapped on. Now my eight year old headphones are like new again. You get what you pay for!
Sennheiser PXC-450 headphones with new ear pads