So like many others, i've had my G930 a long while and the earpads and headband had started to disintegrate. I found a fair bit of info on replacement earpads but not on the headband. Regardless I opted for some cheap blue replacements including a headband on eBay and waited.
Once they came I swapped out the earpads no problem but the headband was difficult to say the least. Basically it comes out via force. Start at one side of the headband and pull it back and twist and it will eventually give out. Luckily putting in the new band was rather easy.
Finished change over: