Veer &Roll Frame for Switchback SeatFrom cityscapes to landscapes our stroller frame makes wandering fun, easy and rewarding. And that's before we mention the adjustable suspension to get you there in cushy comfort and style. Roam all terrains and don't skip a beat, with 1 or 2 passengers. Start rolling from day one. Attach your infant car seat, Switchback Seat or bassinet (sold separately) to go with a newborn. All terrain Performance Accommodates Switchback Seat (sold separately)