Genuine Sennheiser Replacement Ear Pads Cushions for SENNHEISER HD598 SR fit HD515, HD518, HD555, HD558, HD595, HD599 SE Headphones

I 'think' these are them: https://www.amazon.com/Sennheiser-Replacement-Cushions-SENNHEISER-Headphones/dp/B081SRYVF5 Part number 575209 from Sennheiser and the Amazon listing shows: Compatible Headphone Models Sennheiser HD 559, Sennheiser HD 560S, Sennheiser HD 579, Sennheiser HD 598SR, Sennheiser HD 599 SE Model Number 1575209