Replacement Heaphone Ear Pads Cushions for Sennheiser HD 4.50BT 4.40BT HD 4.30 HD 4.20S HD 458BT HD 450 HD HD 350BT Headset Earpads (Cooling-Gel Black)

Pros: I like the feel and the price is good for what you're getting. The fit over the ends is great. So far I can confirm that they still provide comfortable padding and I don't get the sweat buildup or earache from the pressure like the original set. One con: noise cancellation. I do have to increase volume to overcome the impact from it being naturally reduced by the leather material.They take a minute to install, but it's not more difficult than any other set.Good pick for a very reasonable price.