Contrary to what one might think, the foam pads are not just for the comfort of our little ears, they play an important role in the sound of the headphones. But the foam pads get dirty and compressed. Obviously, we always delay changing them a bit... We get so used to this natural deformation that we don't realize the loss of comfort. With new foam pads, you will regain the feeling of a brand new Beyer (and it's really amazing). We didn't remember it was so comfortable! And better yet, you will get a much fuller sound! Why? The foam pads compress and the air between your ears and the speaker is reduced: as a result, the sound changes little by little, it has less room to express itself. With new covers, the air can circulate better: the pressure is better managed by the headphones and the sound becomes more detailed again. Take the step, you'll see, you won't be disappointed!