Life-saving apparatus and equipment, namely, an emergency oxygen system for use in aircrafts comprised of aviation oxygen masks and an oxygen breathing unit being a self-rescue apparatus; aviation oxygen masks not for medical use; gas masks; respiratory masks for the prevention of accident or injury for non-medical purposes; aviation oxygen masks for aircraft cabins, passengers cockpits and pilots for non-medical purposes; self-rescue apparatus, namely, oxygen breathing units; filters for non-medical respiratory masks; parts and fittings for all of the aforesaid goods