A vehicle apparatus comprises an airbag secured to a roof rail of a vehicle and a trim cover. The trim cover has a base member fastened to the roof rail, a flap member, and a living hinge integrally molded between the base and flap members. The flap member rotates on the hinge when the airbag deploys. The flap member also, in a covering position, has a distal edge fastenerlessly clipped to the vehicle.