A flexible, tent-like, enclosure designed to rest against the chin of the patient while remaining away from the face to provide a semi-enclosed environment of enriched oxygen (O2) to increase the patient's O2 uptake. It is connected to a high-flow O2 source and/or humidifier through wide bore tubing. It typically consists of a small rigid plastic device that is contoured around the chin and attached with head straps for stabilization. It is typically used for patients that are adverse to oxygen delivery devices such as a nasal cannula or face mask, usually due to facial surgery or trauma. This is not an O2 face mask. This is a single-use device.