Protective Breathing Equipment (PBE) is designed to protect the eyes and respiratory system of crew members from toxic fumes, gases, and smoke, so that they can safely perform their emergency duty.In-service events were reported to Airbus where the PBE did not work as expected or where cabin crew had difficulties using their equipment or inappropriately used it, which impaired their safety. This article explains the design and specificities of PBE. It recalls the essential maintenance, operational, and training considerations that must be followed in order to ensure PBE integrity and safe use in the case of an emergency.