An airbag for a vehicle includes a top, a bottom, a first panel, and a second panel spaced from the first panel. The airbag includes a first leg, a second leg, and a middle leg. The first leg extends from the first panel in a rearward direction. The second leg extends from the second panel in the rearward direction. The middle leg extends from the first panel and the second panel in the rearward direction. The first panel and the second panel each slant in the rearward direction along a direction from the top to the bottom of the airbag. The first panel and the second panel of the airbag in the inflated position may urge occupants to remain upright during an impact event, reducing loading on a chest of the occupants from seat belt.