HipHopScribe
Headphoneus Supremus
They aren't OEM pads, so who knows if the sound will be the same.
Going by the ad description though, I can say for a fact the eardpads on my X2 aren't "Material: flannel + sponge"
I doubt they're actually flannel, probably a translation issue. Flannel is not exactly a common pad material and they don't look flannel from the photos. Still might not be OEM, though they certainly look closer than other replacements I've seen