I can’t speak specifically to military surplus but the biggest issue with any respirator is fit.
It must conform to the fit of your face without any leakage. If your spouse has facial hair you can get fitted but it’s more difficult.
You’re already at a disadvantage if it’s a used mask as the seal was conformed to someone else.
Statistics: Posted by Blondie — Tue Sep 05, 2017 11:54 am