French ban on face covering
The French ban on face covering is the result of an act of parliament passed in 2010 banning the wearing of face-covering headgear, including masks, helmets, balaclavas, niqābs and other veils covering the face, and full body costumes and zentais (skin-tight garments covering entire body) in public places, except under specified circumstances. This ban does not apply to the hijab, as it does not cover the face.
Source: Wikipedia — French ban on face covering (CC BY-SA 4.0)