Mask assembly (110, 300, 400, 500) includes a forehead support (120, 220, 316, 416, 520) having a base provided to a frame and two upwardly extending support arms (130, 230, 318, 418, 518). The arms define a fixed or adjustable included angle that is less than 180 degrees and in the range of about 100-150 degrees. The arms can be attached either directly to headgear straps, or the arms can be connected to headgear straps via clips (150, 506). Also claimed is an embodiment with one arm.