noun, masculine/bɑ̃.do/plural: bandeaux
bandeau is masculine in French.
headband, bandeau; parted hair; bandage; blindfold; a tight headband worn for a long time, usually from youth, for the ancient folk custom of cranial deformation
“Elle allait rue de la Comédie, chez un coiffeur, se faire arranger ses bandeaux.”
From Old French bandel (from bande + -el).