A patient interface comprising: a plenum chamber pressurisable to a therapeutic pressure of at least 6 cmH 2 O above ambient air pressure, said plenum chamber including a first plenum chamber inlet port and a second plenum chamber inlet port, each being sized and structured to receive a flow of air at the therapeutic pressure for breathing by a patient, a seal-forming structure constructed and arranged to form a seal with a region of the patient's face surrounding an entrance to the patient's airways, said seal-forming structure having a hole therein such that the flow of air at said therapeutic pressure is delivered to at least an entrance to the patient's nares, the seal-forming structure constructed and arranged to maintain said therapeutic pressure in the plenum chamber throughout the patient's respiratory cycle in use; a positioning and stabilising structure to provide a force to hold the seal-forming structure in a therapeutically effective position on the patient's head; the positioning and stabilising structure including a first conduit connector assembly configured to deliver the flow of air at the therapeutic pressure, the first conduit connector assembly including a first connector opening, the positioning and stabilising structure including a second conduit connector assembly configured to deliver the flow of air at the therapeutic pressure, the second conduit connector assembly including a second connector opening, wherein the first conduit connector assembly and the second conduit connector assembly form a tie configured to transfer tension force from the positioning and stabilising structure to the plenum chamber, causing the seal forming structure to press against the face of the patient; wherein the plenum chamber and the first conduit connector assembly are attracted to each other through a magnetic force; wherein the plenum chamber and the second conduit connector assembly are attracted to each other through a magnetic force; wherein a sealed connection is formed between the plenum chamber and the first conduit connector assembly such that air is configured to pass through the first connector opening and the first plenum chamber inlet port; and wherein a sealed connection is formed between the plenum chamber and the second conduit connector assembly such that air is configured to pass through the second connector opening and the second plenum chamber inlet port. a plenum chamber pressurisable to a therapeutic pressure of at least 6 cmH 2 O above ambient air pressure, said plenum chamber including a first plenum chamber inlet port and a second plenum chamber inlet port, each being sized and structured to receive a flow of air at the therapeutic pressure for breathing by a patient, a seal-forming structure constructed and arranged to form a seal with a region of the patient's face surrounding an entrance to the patient's airways, said seal-forming structure having a hole therein such that the flow of air at said therapeutic pressure is delivered to at least an entrance to the patient's nares, the seal-forming structure constructed and arranged to maintain said therapeutic pressure in the plenum chamber throughout the patient's respiratory cycle in use; a positioning and stabilising structure to provide a force to hold the seal-forming structure in a therapeutically effective position on the patient's head; the positioning and stabilising structure including a first conduit connector assembly configured to deliver the flow of air at the therapeutic pressure, the first conduit connector assembly including a first connector opening, the positioning and stabilising structure including a second conduit connector assembly configured to deliver the flow of air at the therapeutic pressure, the second conduit connector assembly including a second connector opening, wherein the first conduit connector assembly and the second conduit connector assembly form a tie configured to transfer tension force from the positioning and stabilising structure to the plenum chamber, causing the seal forming structure to press against the face of the patient; wherein the plenum chamber and the first conduit connector assembly are attracted to each other through a magnetic force; wherein the plenum chamber and the second conduit connector assembly are attracted to each other through a magnetic force; wherein a sealed connection is formed between the plenum chamber and the first conduit connector assembly such that air is configured to pass through the first connector opening and the first plenum chamber inlet port; and wherein a sealed connection is formed between the plenum chamber and the second conduit connector assembly such that air is configured to pass through the second connector opening and the second plenum chamber inlet port.