There are two tabs on the inside of the headband that pop out (one on either side). Once they're removed the foam portion just slides right out. You slide in the new one and put the tabs back. And you're done!
Earpads are even easier. They just pull off and the new ones snap in where the old ones were.
I'm sure you could find a YouTube video showing how to do it.
Edited by Anavel0 - 1/4/14 at 7:07am