Do you also carry an N95? A Tyvek suit would also help.
Obviously radiation will pass through it, for protection against that you need lead based suits.
And there’s still big piles around in warehouses, turning brown and rubber straps deteriorating.
Unless these N95s are being stored in a bog, I have a hard time understanding how they're "turning brown" and "deteriorating" in the span of two years.
Such unlikely claims would need a source.