The present invention relates to a patient interface comprising: a sealing arrangement (20) adapted to provide an effective seal with the patient's nose； and an inlet conduit (44) arrangement extending from the sealing arrangement to the crown of the patient's head and adapted to deliver breathable gas to the sealing arrangement, wherein the inlet conduit arrangement extending from the sealing arrangement to the crown of the patient's head at least in part defines a truncated cone (O, I).
