A respiratory mask (1, 2, 3), preferably a nasal mask, comprising a main body (1) and two lateral arms (4, 5) integrally fixed to said main body (1) and projecting laterally from said main body (1), each of said two lateral arms (4, 5) being made of a first flexible material and comprising a proximal region (40, 50) with a proximal end (4b, 5b) fixed to the main body (1), a distal region (41, 51) comprising a free distal end (4a, 5a), and an intermediary region (42, 52) located between and adjacent to the proximal region (40, 50) and the distal region (41, 51). Each of said two lateral arms (4, 5) exhibits in the intermediary region (42, 52) a first flexibility that is greater than the second flexibility of said two lateral arms (4, 5) arms in the proximal region (40, 50) and in the distal region (41, 51). The respiratory mask of the present invention is useable for treatment of a respiratory disorder or condition in non-invasive positive pressure ventilation or in a nasal continuous positive airway pressure therapy of sleep disordered breathing conditions, such as obstructive sleep apnea.
