The bag says "not sterilized, 100% polypropylene, two layers of non-woven fabric, disposable"
How can I sterilize the mask so that I can use the mask as many times as possible, that is without damaging the mask?
I should point out that these masks are the ones with the lowest price and they are very thin. At a short distance I can easily smell things from the environment.
Thank you in advance for your help