A vent for an inflatable chamber, such as an airbag cushion, can include a first flap and a second flap. The first flap and second flap can be opposing and/or overlapping. The first flap and the second flap impede fluid flow through the vent when the vent is in a closed state. Free ends of the first flap and the second flap can be positioned at an exterior of the inflatable chamber when the vent is in the open state.