The replacement ear plugs are trash, they are 100% different quality and materials than the ones that come with with the ISO tune sport headphones. Definitely cheaper materials used, they take forever to expand in your ear and don't feel as good.

The ear tips are good when you first start using them, but after a several hours of wearing them, and taking them in and out. They get so you cant mold them down, to put them in the ear correctly. And if you try to clean them in warm,cold water. They swell up and can't ever be molded down to put back in the ear comfortably as well. I feel like there is a issue with the longevity or life of them. Great idea just need a better finished product. Or try another material or something?

The two sets I have quit working the same day. Left ear quit working on one pair and the other pair would sometimes play music but kept beeping and saying disconnected/connected. Conection to blue tooth got to be pretty spotty. I ordered another pair and we’ll see how long this set lasts. That will definitely play a Big part whether I recommend these to anyone

I ordered the small (green) set based on what I was using from my original purchase. I received the product promptly and was pleased the mailing and handling, however, when I placed the green eartips on my ISO and tried to put them in my ear, I found that they are too small and they hurt my ears. I would like to return them, but am not sure how to do that — and I used two of the eartips.