I bought these to replace the original ear pads on my DT100 headphones. I have yet to find any headphones that are 100% comfortable for long sessions but these are certainly close and keep my ears comfortable for 30-60 mins without feeling discomfort. They're very long-lasting and the only reason I had to replace the original pair (after 5 years of occasional use) was because I used them in a performance and they got water-damaged (impressively only the pads and not the headphones) and I didn't notice to dry the pads promptly.
After many years of use of my good old faithful DT-100 headphones I was delighted to know that I could find replacement ear pads. Soft, comfortable and reliable. In my experience, replacement parts are a sign of quality products. This is a high quality product.