Abstract: An inflatable vehicle occupant protection device (20) is attached to a vehicle part (22). The protection device (20) is deployable, upon inflation, through a deployment opening (24) in the vehicle part (22). A cover (60) closes the deployment opening (24) prior to deployment of the protection device (20). The cover (60) moves away from the vehicle part (22) upon deployment of the protection device (20). Attachment devices (82, 300) releasably attach the cover (60) to the vehicle part (22) and comprise a clip (120, 302) which is attachable to one of the cover and the vehicle part. The one of the cover (60) and the vehicle part (22) has a mounting opening (86, 322) and a recess (88, 324) adjacent the mounting opening. The clip (120, 302) includes a retaining portion (152, 364) biased to be received in the recess (88, 324) to inhibit removal of the clip, an opening (162, 380) for alignment with the mounting opening (86, 322), and a resiliently deflectable portion (164, 382).