The exterior materials are very good. They match the OEM ear pads, but one of the most important parts with a replacement ear pad is what you cannot observe with your eyes. It's the foam inside the ear pad. The oem ear pad has much much better foam, and helped with sound isolation. Given these are not active sound cancelling, the sound damping qualities of the ear pad are very important. These ear pads are not comparable to the originals, which is disappointing, because they look/feel like great quality. They just don't sound like great quality.UPDATE: Customer Service reached out to me, and explained that they have an updated version that fixes the issue with sound bleeding. It has a layer of gel that sits against the head under the leather surface. So if you have the Epos GPS 670’s, make sure you get the right one. I’ve since tested them and they are equal to the original sennheiser replacement pads, at a better cost. Changing my rating because of excellent custom service.