These were terrible for me.  I attempted to wear them for my hour workout and had to remove them long before i finished.  I bought them for the little pull tab for ease of removal.  I found that they were hard to get in my ear even when moistened.  Once in the ear i had to push them very far in to get the seal.  The seal never seemed to work well.  My ears hurt the rest of the day.

I don't even know how these are supposed to work. I'm not sure if its because I have small ears or what, but they just do'nt to it for me.