Ear Pads Cushion for Sennheiser HD 650 600 535 545 565 580 HD660 S Headphones | eBay
Dekoni Elite Sheepskin replacement earpads for the Sennheiser HD6XX Series
Amazon.com: Gvoears Replacement Earpads for Sennheiser HD650/HD600/HD660S/HD545/HD525/HD535 Headphones, Ear Pads Cushions Also Compatiable with Massdrop X HD6XX/HD58X and HD580/HD565 Jubilee Headphones(Velour) : Electronics
Amazon.com: Gvoears Earpads for Sennheiser HD650/HD600/HD660S/HD545/HD525/HD535 Headphones, Earpads Cushions also Compatiable with Massdrop X HD6XX/HD58X and HD580/HD565 Jubilee Headphones, Upgraded Velour Fabric : Electronics