FYI, everyone: While these pads are shaped like Audio-Technica's stock pads, they are not as comfortable as Brainwavz oval pads, which offer far more interior space for your ears. Multiple material available, as well, each of which will alter the sound you hear from the headphones.
carlosedcyoutubeThe retail cost of Brainwavz' pads range from $12.99 to $49.50, but one can buy them on sale or with a coupon. For people that use their M50s on-the-go, I recommend this lesser-known model from Brainwavz:
https://www.amazon.com/dp/B07FSPNJH6 ... the small-size Sheepskin Leather, which will tame the treble slightly, as well as make the sound a little bassier (compared to the stock pads). For better comfort, choose the full-size oval pads and/or brands that use soft materials and memory foam:
Geekria (fake leather, matches the M50's cup shape)
https://www.amazon.com/dp/B00KXRZPAU
Krone Kalpasmos (Cooling-Gel)
https://www.amazon.com/dp/B07JN7FR3W
Off-brand (larger opening, oval)
https://www.amazon.com/dp/B07M6PN4YM
LTYIVABHTTW (velvet, increased depth)
https://www.amazon.com/gp/product/B07FN78WBS
HirakGood news: Brainwavz just released new pads designed for ATH that result in sound closer to the stock pads. But if one desires more bass and lower mids and (far) less treble, their Micro Suede oval pads are the way to go. (They'll be more comfortable, too.)