Air delivery conduit

1. A mask assembly for providing pressurized gas to a patient for treatment of sleep disordered breathing, the mask assembly comprising:

a patient interface configured to interface with the patient's face to deliver a flow of pressurized gas to the patient's airways; and

an air delivery conduit configured to deliver the flow of pressurized gas from a source to the patient interface, the air delivery conduit being configured to readily deform to reduce tube drag and comprising:

a textile layer forming a tubular conduit,

a support structure arranged to provide structural support to the conduit;

an air impermeable inner laminate layer formed on an inner surface of the textile; and

an air impermeable outer laminate layer covering the support structure.

2. The mask assembly of claim 1 , wherein the textile comprises threads or fibres, and the threads or fibres have varying elasticities or stiffnesses.

3. The mask assembly of claim 1 , wherein the textile comprises a weft and a warp of different elasticity.

4. The mask assembly of claim 3 , wherein the warp is more elastic than the weft.

5. The mask assembly of claim 3 , wherein the weft is more elastic than the warp.

6. The mask assembly of claim 1 , wherein the outer laminate layer is formed on an outer surface of the textile.

7. The mask assembly of claim 1 , wherein the support structure is attached to the textile.

8. The mask assembly of claim 1 , wherein the support structure is attached to an outer surface of the textile.

9. The mask assembly of claim 8 , wherein the support structure is laminated to the outer surface of the textile.

10. The mask assembly of claim 1 , wherein the support structure is disposed between the outer laminate layer and the textile.

11. The mask assembly of claim 1 , wherein the support structure provides the textile with form.

12. The mask assembly of claim 1 , wherein the support structure encourages the conduit to maintain a tubular shape and helps to prevent occlusion of the conduit.

13. The mask assembly of claim 1 , wherein the support structure forms a helix.

14. The mask assembly of claim 1 , wherein the textile is at least one of a woven fabric, a knitted fabric and a 3-D printed fabric.

15. The mask assembly of claim 1 , wherein at least one of the inner laminate layer and the outer laminate layer is embodied as part of the textile and reacts to heat to form a sealing layer.

16. The mask assembly of claim 1 , wherein at least one of the inner laminate layer and the outer laminate layer is attached to the textile with an adhesive.

17. The mask assembly of claim 1 , wherein the textile has a tubular shape formed by welding opposing end portions of the textile to form a longitudinal weld seam.

18. The mask assembly of claim 17 , wherein the longitudinal weld seam comprises a thermoplastic filler material.

19. The mask assembly of claim 1 , wherein the textile comprises a plurality of first threads or fibres extending substantially in a longitudinal direction of the air delivery conduit and having a different elasticity or stiffness than a plurality of second threads or fibres extending substantially in a circumferential direction of the air delivery conduit to provide increased stretchability of the air delivery conduit in the longitudinal direction as compared to stretchability in a radial direction of the air delivery conduit.

20. The mask assembly of claim 1 , further comprising headgear to support the patient interface on a patient.

21. The mask assembly of claim 1 , wherein the outer laminate layer is formed on an outer surface of the textile,

wherein the support structure is attached to an outer surface of the textile,

wherein the support structure is disposed between the outer laminate layer and the textile, and

wherein the support structure provides the textile with form.