Swivel elbow and connector assembly for patient interface systems

An air delivery tube connector configured to be connected to a patient interface that is configured to deliver a flow of pressurized respiratory gas to a patient's airways, the air delivery tube connector comprising:

• a base structure configured to removably connect to the patient interface, the base structure being formed from a first material and including a pair of cutout portions;
• a plurality of vent holes formed on the base structure;
• a continuous flexible portion that is more flexible than the base structure, the continuous flexible portion being formed from a second material that is different than the base structure;
• and
• a pair of opposing release buttons that are configured to be inwardly flexed to allow release of the air delivery tube connector from the patient interface,
• wherein the base structure forms a skeleton that supports the continuous flexible portion,
• wherein the base structure and the continuous flexible portion together enclose and form the part of a gas flow path extending through the air delivery tube connector, and
• wherein each of the opposing release buttons is formed at a location on the air delivery tube connector at which the continuous flexible portion is molded over the cutout portions in the base structure.