No, the main part is the leather. Not all the cork was replaced either, it was just firmed up. Regardless, it's still lasted twice as long as a resole (and I di

No, the main part is the leather. Not all the cork was replaced either, it was just firmed up. Regardless, it's still lasted twice as long as a resole (and I didn't have to break them in) for half the price of new, and they're still going strong.