A patient interface for supplying respiratory gases to a user is described. The patient interface may be used in a humidified CPAP system for supplying humidified gases to the user. The patient interface comprises a mask body (30) and a seal assembly (40). The seal assembly includes a flexible seal (43) and a rigid seal clip (42), the seal assembly being removably attached to the mask body via the rigid seal clip. The mask body and rigid seal clip arc profiled to match the contours of a user's face so that the seal has a substantially constant wall depth.
