An airbag retainer has sidewalls that are constrained to less than ninety degrees from the base and may have an additional terminal end feature. An additional flange or hook feature at the base of the retainer can also be implemented. The sidewalls and the optional flange/hook reduce the size, velocity, and temperature of effluent particulates discharged from an airbag inflator, which helps neutralize the particulates against damaging the airbag fabric. The sidewall angle and the use of an additional flange or hook can be tuned to maximize the particulates neutralization.

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