Abstract: An airbag having an outer skin enclosing a gas space. The outer skin has a first side wall (11) and a second side wall (12). The first side wall (11) and second side wall (12) are connected to one another at a first end (71), the first side wall (11) extends from the first end (71) to a second end (72), the second side wall (12) extends from the first end (71) to a third end (73), a third side wall (23) extends from the second end (72) of the first side wall (11) to a fourth end (74), and a fourth side (24) wall extends from the fourth end (74) to the third end (73) of the second side wall (12). The third side wall (23) is separate from the first side wall (11) and extends from a fifth end (75) connected to at least a portion of the second end (72) of the first side wall (11) by a first seam (81). The fourth side wall (24) is separate from the second side wall (12) and extends from a sixth end (76) connected to at least a portion of the third end (73) of the second side wall (12) by a second seam (82).