Sfortunatamente si è verificato un errore, La preghiamo di riprovare più tardi.
What can I say?
I mean this is just foam for the Sennheiser headphones. You replace it when there is a hole in the old ones. My foam on my HD25's was torn for a while and I got used to the sound. When I bought these and replaced them I needed some time to adjust my ears to the "new" sound.