These Cushion & Flap Packs are designed for use with all TrueBlue Nasal CPAP and BiPAP Masks. The TrueBlue's Premium Blue Gel Cushion works together with the thin, form fitting outer silicone Comfort Flap to create a personalized, self-adjusting seal.
SIZING:The TrueBlue Nasal mask uses three different mask frame sizes -- Petite, Small/Medium, and MediumWide/Large. Petite cushions will only fit the Petite frame. Small and Medium cushions will only fit on the Small/Medium frame. MediumWide and Large cushions will only fit the MediumWide/Large frame. Cushion size is indicated on the bottom of the cushion. Flap size is indicated on the outer right side of the flap.