A delivery conduit (6A,6A′,6B,6C) for delivering a flow of gas in a respiratory therapy system (2) includes an elongated wall member (22,34) made of a textile material, and a support member (24, 36, 36′, 36″, 42, 50, 58, 64, 70) extending along at least a portion of the length of the wall member. The support member engages either the inner surface or the outer surface of the wall member, and engages less than the entirety of the inner surface or the outer surface of the wall member such that a plurality of portions of the wall member are not engaged by the support member and at the plurality of portions the wall member is the only barrier to the gas within the delivery conduit.
