An example tethered airbag arrangement includes an airbag movable to an expanded position. The airbag includes a contact face. An internal tether constrains expansion of the contact face. An external tether system includes tether portions and at least one bridge portion. The tether portions constrain expansion of the contact face. The bridge portion limits separation between one of the tether portions and an adjacent one of the tether portions as the airbag moves to an expanded position.