What's that thin layer of something still left on skinless chicken breasts?

Whenever I cut skinless chicken breasts, there's a very thin, barely visible layer of something on it that's hard to scrape or cut off. Once I do scrape it off, it kind of looks like skin. Does anyone know what that thin layer is called?What's that thin layer of something still left on skinless chicken breasts?
That is connective tissue that held the skin to the muscle. I forget the proper name though...What's that thin layer of something still left on skinless chicken breasts?
the membrane is called the fasha it keeps the outer skin attached to the muscle .if you need to get it off soak the breasts in a mild salt brine for an hour or so and it usually comes off easily.
that is just a membrane covering the breast. Perfectly fine to eat or remove
I believe it is called momentum, you have it too around your organs and muscles
membrane. It is just something to prevent friction between other organs and muscles

acne scar cream

oil

printer toner

black oil