A patient interface, including a mask assembly and a headgear assembly, provides improved facial sealing and improved ease of use. The mask assembly includes an inflating or ballooning seal. The seal can be secured between two portions of a snap-fit exoskeleton. The headgear assembly connects to the mask assembly with flexible straps during course fitting and with more rigid straps following course fitting. The straps include holes that fit over a tapering post on the mask assembly.一種包括面罩組件和帽盔組件的病人界面提供了改進的面部密封和改進的易用性。該面罩組件包括一充氣或膨脹密封。該密封可以固定在卡扣配合外骨骼的兩個部分之間。該帽盔組件在配合過程用柔性帶並且在配合過程以後用更剛性的帶連接至該面罩組件。該等帶包括在面罩組件上的錐形柱上配合的孔。