Originally Posted by Christopher Morris
Do you adapt those each time you use it? Or does it harden and keep its shape?
You only shape it once. You heat it up (I used a stove, but you can also do it in the microwave), let it cool a little bit, then shape it, it hardens, and unless you change earbuds, it's set and forget. If you DO change earbuds, or maybe the fit wasn't right, you can re-mold them. They have simple instructional videos on how to do it all. After getting them and loving them, both of my roommates (runners) got them as well.