Once, this is the right answer to this question. You out on your mask and went to the mall. Let say you spend an hour there then on your way back to your home, you can take off your mask and throw it away. You cannot use it again. The disposable face mask Italy are meant to be dispose of after using for once. However, there are some people who do not like to throw away their mask and keep on reusing them over and over again. That’s bad for them. What do you think about it?