I had bad luck with the RZ masks. Both the single and double strap ones fit badly- either the metal nose piece was down around the tip of my nose and interfering with my breathing, or the edges were up in my eyes and interfering with my vision. Too bad; they're pretty well made.
Oh, I don't know how you're planning to use them,
@sabergirl, but they have unfiltered exhalation valves, which makes them non-Covid compliant.