The default leatherette ear pads are comfortable, but cheap feeling and I could tell that they would crumble over time because it’s the ‘thin’ material that just flakes when they dry out OR get overused. Because of this, I did purchase Felt earpads (search for Genuine Sennheiser HZP 26 Replacement Ear Pads Cushions).
https://www.amazon.com/Sennheiser-GAME-Gaming-Headset-Black/dp/B00KNPYAEY

