Questions about example sentences with, and the definition and usage of "Respirator"

A: I interpret that as the shelf-life of the respirator, I would not interpret that as the number of times the respirator may be used. "Used" would be correct for what you said, respirators used more than once.

If you look at a few other parts of that link, they also say this.
"Meaning When new N95 respirators are unavailable, N95 respirators past their expiration date; sterilized, used N95 respirators; and other less common respirators can be acceptable alternatives."

So from that context, it is clear to me they mean shelf life, since they are listing 3 different respirator situations.
- n95 past their expiration date
- sterilized, used n95 respirators
- other less common respirators

A: splendid explaination. Thank you so much

A: @joaquin3227 thank you

A: instead of filter you should use "filtered" for better grammar but your sentence is almost perfect tho💜💜💜👍