Abstract: A respiratory mask and a face seal for a respiratory mask, the face seal being configured to maintain a seal against the user's face even when the user moves his/her jaws and/or cheeks. In one embodiment, a respiratory mask comprises a body and a face seal coupled to the body, and the face seal includes a sealing land configured to contact the user's face and a compressible portion extending away from the sealing land. In one embodiment, the face seal further includes a chin retainment element configured to receive at least a portion of the user's chin therein. In one embodiment, the compressible portion is transitionable between an uncompressed first condition and a compressed second condition.