"It's made in Korea, but..."

Wasn't it uncomfortable every time you breathed?
Doesn't it sting every time it touches your skin?
Doesn't it hurt every time you put it on your ear?

Inexpensive material that makes breathing difficult
Irritating endothelium without considering the skin
Low-elastic ear straps, etc.

Don't be reassured that it's a Korean product.
Make sure you have the correct mask to use