A breathing assistance apparatus for use with delivery of respiratory gases to a patient, comprising: a patient interface, having a hollow body or base (102, 302) adapted to cover the nose, or nose and mouth of said patient, the hollow body or base (102, 302) constructed of a relatively inflexible material such as polycarbonate plastic and comprising an inlet connected to an inspiratory conduit, and a sealing interface, including at least an outer sealing member (201, 301, 400), said outer sealing member (201, 301, 400) having a periphery that is attachable to said hollow body or base (102, 302) in a sealing manner, wherein said outer sealing member (201, 301, 400) is adapted to substantially seal around the facial contours of said patient providing a sealed fluid communication to the respiratory tract of said patient, characterised in that: the periphery of said outer sealing member (201, 301, 400) comprises a hard plastics material, a remainder of said outer sealing member (201, 301, 400) comprises silicone and comprising a substantially thin section (203, 305), said periphery being substantially rigid compared to the remainder of said outer sealing member (201, 301, 400), the outer sealing member (201, 301, 400) is formed by injection moulding, whereby a chemical bond is formed between the periphery and the remainder of said outer sealing member (201, 301, 400). a patient interface, having a hollow body or base (102, 302) adapted to cover the nose, or nose and mouth of said patient, the hollow body or base (102, 302) constructed of a relatively inflexible material such as polycarbonate plastic and comprising an inlet connected to an inspiratory conduit, and a sealing interface, including at least an outer sealing member (201, 301, 400), said outer sealing member (201, 301, 400) having a periphery that is attachable to said hollow body or base (102, 302) in a sealing manner, wherein said outer sealing member (201, 301, 400) is adapted to substantially seal around the facial contours of said patient providing a sealed fluid communication to the respiratory tract of said patient, characterised in that: the periphery of said outer sealing member (201, 301, 400) comprises a hard plastics material, a remainder of said outer sealing member (201, 301, 400) comprises silicone and comprising a substantially thin section (203, 305), said periphery being substantially rigid compared to the remainder of said outer sealing member (201, 301, 400), the outer sealing member (201, 301, 400) is formed by injection moulding, whereby a chemical bond is formed between the periphery and the remainder of said outer sealing member (201, 301, 400). the periphery of said outer sealing member (201, 301, 400) comprises a hard plastics material, a remainder of said outer sealing member (201, 301, 400) comprises silicone and comprising a substantially thin section (203, 305), said periphery being substantially rigid compared to the remainder of said outer sealing member (201, 301, 400), the outer sealing member (201, 301, 400) is formed by injection moulding, whereby a chemical bond is formed between the periphery and the remainder of said outer sealing member (201, 301, 400).