Inflatable protection device with manifold

An apparatus (10) for helping to protect an occupant of a vehicle (12) includes an inflatable vehicle occupant protection device (14). The protection device (14) includes panels (40 and 42) and a plurality of chambers (54) at least partially defined by the panels. An inflation fluid source (24) is actuatable to provide inflation fluid for inflating the protection device (14). The protection device (14) further includes a manifold (100) at least partially defined by the overlying panels (40 and 42). The manifold (100) includes a plenum portion (102) for receiving inflation fluid from the inflation fluid source and duct portions (104) that branch from the plenum portion and distribute inflation fluid into the chambers (54).