Visor

vi·sor ˈvīzər/ noun noun: visor; plural noun: visors; noun: vizor; plural noun: vizors NORTH AMERICAN "a blue cap with a red visor"
 * a stiff brim at the front of a cap.
 * synonyms:    brim, peak, eyeshade; bill
 * a movable part of a helmet that can be pulled down to cover the face.
 * a screen for protecting the eyes from unwanted light, especially one at the top of a vehicle windshield