Apparatus for breathing purposes (artificial respiration); Apparatus for the alleviation of breathing difficulties; Apparatus for the treatment of breathing difficulties; Connections for use with breathing apparatus for artificial respiration; Inserts for breathing apparatus for medical use; Inserts for breathing apparatus for surgical use; Inserts for breathing masks for medical use; Inserts for breathing masks for surgical use; Medical apparatus for assisting breathing; Medical apparatus for training breathing techniques; Portable breathing apparatus for artificial respiration; Protective breathing masks for artificial respiration; Protective breathing masks for medical applications; Protective breathing masks for surgical applications; Protective breathing masks made of non-woven materials for medical applications; Protective breathing masks made of non-woven materials for surgical applications; Respiratory breathing apparatus, other than for medical use; Self-contained breathing apparatus for artificial respiration; Surgical breathing masks; Ventilator breathing apparatus for artificial respiration; Artificial sleep apparatus; Continuous positive airway pressure nasal apparatus for the treatment of sleep apnoea; Medical masks