I listened to community and made those pads. I've used the most thin and expensive goat skin I've found in Ukraine. It's a goat skin that is usually used for premium gloves. Also they're angled and improve soundstage a bit. What was the goal? 1. Many mebmers asked for brighter sounding headphones. How can I achieve this? Can I bring up the treble? Sure no. But I can... lower the whole region before 3 Khz 2. When using perfo leather I've solved one main problem - I've leveled air pressure on both sides of membrane. 3. Comfort wise - real leather is much more comfortable especially in summer.