Strapless nasal interface device

A method of wearing a nasal interface device about a nasal bone of a bridge, a first side, and a second side of a user's nose, comprising the steps of:

• providing the nasal interface device comprising:
• an air supply interface body including an air supply opening, at least one nasal opening, and first and second attachment surfaces;
• a bendable metallic member including a bridge portion between first and second ends;
• an adhesive secured to an underside of the bendable metallic member;
• a first elastic member having a first proximal end and a first portion, the first proximal end including a first coupling means for directly or indirectly attaching to the first end of the bendable metallic element, and the first portion engaging with the first attachment surface on the air supply interface body;
• and
• a second elastic member having a second proximal end and a second portion, the second proximal end including a second coupling means for directly or indirectly attaching to the second end of the bendable metallic element, and the second portion engaging with the second attachment surface on the air supply interface body;
• wherein each of the first and second elastic members has a Young's modulus of between about 0.01 and about 0.1 GPa;
• wherein each of the first and second elastic members are separate and apart from each other and the air supply interface body, and wherein the first and second portions of the first and second elastic members are adjustable in position on the air interface body;
• compressing the bridge portion of the bendable metallic element downward over the nasal bone of the bridge and toward the first and second sides of the user's nose;
• positioning the air supply interface body about the user's nose, wherein the first and second attachment surfaces of the air supply interface body are adjacent to the first and second sides, respectively, of the user's nose;
• adjusting the first and second portions of the first and second elastic members on the air interface body;
• pulling the first and second elastic members taut in order to form a seal where the air supply interface body meets the user's nose;
• and
• securing each of the first and second coupling means to maintain the seal without needing straps extending around the user's head and neck.