noseband
noun
nose·band ˈnōz-ˌband 
: the part of a headstall that passes over a horse's nose
Example Sentences
Recent Examples on the Web Vogmask These filter masks claim to filter out airborne particulate .3 microns or larger, and additionally come with an exhalation valve and noseband for a tighter fit. 
Hanna Horvath, NBC News, 3 June 2020 And that’s not even considering that proper face masks have a metal noseband that definitely won’t play nice with your microwave. Sandra Gutierrez G., Popular Science, 9 Apr. 2020
Hanna Horvath, NBC News, 3 June 2020 And that’s not even considering that proper face masks have a metal noseband that definitely won’t play nice with your microwave. Sandra Gutierrez G., Popular Science, 9 Apr. 2020 Word History
First Known Use
circa 1611, in the meaning defined above