An apparatus (10) includes an inflatable protection device (14) having an upper portion (60) and a lower portion (62) and an inflator (32) having inflation fluid outlets (33). The inflator (32) is actuatable to inflate the protection device (14). A retainer (70) includes a base portion (72) for clamping the inflator (32) to a support member (34). The retainer (70) further includes a cover portion (74) that has a deflector portion (86) and a top portion (88). The deflector portion (86) directs inflation fluid from the inflator (32) into the protection device (14) in a direction substantially parallel to a central axis (37) of the inflator (32). The cover portion (74) directs inflation fluid from a first half (74a) of the cover portion (74) into the upper portion (60) of the protection device (14) at a first volumetric flow rate and from a second half (74b) of the cover portion (74) into the lower portion (62) of the protection device (14) at a second volumetric flow rate that is greater than the first volumetric flow rate.