Yup, I learned about it later. Its called radians. There are other companies. I did try the material and works okay. The key design factor is that it won’t stick to your skin or eardrums. Well there are kits that are like that, do you gotta test the material before you go stick it up your ear holes. Even I wasn’t that dumb. I practiced several times before committing LOL. You would not LOL not hearing anything anymore, so again, just go to the audiologist. It defeats the purpose if you hurt your hearing while trying to hear better.