A mask system and an air delivery conduit (200) for use in the treatment of respiratory disorders is disclosed. The air delivery conduit (200) may comprise a textile (220) having an airtight arrangement. A support structure (240) may be provided to the conduit to provide form. The warp and the weft may comprise different fibres or threads. For example, the weft may be formed of a material that has more stretch or is more elastic than the warp. In this configuration, the textile may be able to stretch more readily in a lengthwise direction, i.e. along its central axis due to the elasticity or stretchiness of the weft. The textile also may more readily stretch when the conduit is bent, due to the increased stretchability of the weft. This may cause the air delivery conduit to be more supple or more readily deform and thereby reduce conduit drag. Furthermore, the textile in this arrangement may exhibit an increased resistance to torque or twisting when the air delivery conduit is pulled or a lengthwise force is applied to the air delivery conduit, due to the less elastic material of the warp. An inner laminate may be formed on an inner surface of the textile. Methods of manufacture are also disclosed. The hose may be manufactured by extruding a tube of polymer (230) in a molten state and wrapping the tube with a textile while still hot to create a bond between. The textile comprises threads or fibres, and the threads or fibres have varying elasticities or stiffnesses.
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