SOULWIT Cooling-Gel Earpads Cushions Replacement for Sennheiser HD650, HD660 S, HD660S2, HD600, HD6XX, HD58X, HD580, HD565, HD545, HD535 Headphones, Ear Pads with Ice Silk Fabric - Dark Coffee

I only had it for a few days , but it’s very comfy (might I say better then OEM, no noticeable difference in sound signature

It does the job of being a placeholder. Advertised cooling properties are not true and actually quite the opposite. Pads instantly heat up with your body signature unless you use the droplet; it dries up fast. Furthermore, it changes the sound signature where it mutes bass significantly. I am currently using them as a placeholder until OEM replacements arrive. Also, it is seriously overpriced in this listing/seller; original price is half the listed one here.

Great fit, but a bit of a hassle to get on (it uses a different technique than the standard ones but once its on its a massive improvement over (worn) stock pads. They give a warmer sound that I like and a lot of clarity is back to my HD6xx that got lost over the years by wear and tear. Definitely would recommend them and will likely buy them again once this pair is worn.

Physical side : The comfort is very good. The seal is thight. They have a cool effect for real. They fit like original so change For the sound They seem to improve a little bit the bass response But the soundstage take a lite hit. But they still have a good one and the extra bass is a + for some

I've bought replacement pads for my 650's before and they were a nightmare to fit and kept falling out. I had to put my old, worn out, original pads back in. A friend recommended these, so I tried them. Fitted in easily and are rock solid. These are the ones!!!!

I must admit, I wish they were a bit bigger and thicker. They're still pretty comfortable and sound fine, to me. I removed the foam sheet from the hd600s and I think that helped the sound a little(kept them for later, though, just in case). They are technically pretty cool, temperature wise, but I wouldn't say it's more than the OEM pads. So I wouldn't get them specifically for that. I do think they look good, and for the price it's hard to complain. I probably do prefer the OEM pad's sound, but I wouldn't say these have less resolution or anything, just a slightly different character that's more "thick" in a bassy kind of way. And they look better, or at least more interesting, so I'd say that at least breaks even with the sound situation haha. The sound difference is pretty subtle, too, so you might not even notice, honestly.

For me personally, i really like them. Feels good on the ear and the sound on my hd6xx feels warmer. But if you are scared of the sound change, maybe you should go for the originals(be careful of fake).