The Shures have different sized rubber seals. These were the head phones that fit me the best. I was using the stock ipod head phones, and they were to large for my ears... I would wear the shures for 4 hours at a time and they were very comfortable for that length of time. I don't know if you will be using them for longer or not, but i would think you could wear them for 8+ hours a time, no problem.