Do you have a car seat that fits in the stroller? You may use most of the infant car seats on the market with the stroller as a travel system. We recommend the Graco Snug Ride, Graco Safe Seat Britax Companion and Peg Perego Primo Viaggio infant car seats because of the secure fit with the Urban Advantage. We have an extension strap that connects to the 5-point harness. It goes over the top of the infant car seats for added safety. All of our units have the strap included.