I feel like a few weeks of use will help make them very comfortable. So, Im thinking that as much as I want them to work, maybe Chacos just arent for me. We are very happy with these new cords as they are strong and durable . Make no mistake the sound is awesome, but battery isnt. medium size fits with Sennheiser CX 300 II. Ive had them for several months now, and the thin liner in the right show has come off and I had to glue it back in, but as constantly as I have worn them, thats to be expected! Most of the time I dont pick up calls while wearing earbuds because usually, I cant hear the person talking, yet with these earbuds, I could hear clear + loudly enough to understand them. Good shoes but a little on a small side. After using it for a few hours the past two days, Im happy to say that my ears are no longer feeling that pain from prolonged use and that the ear cushions are fairly comfortable. Don?t buy these!