At what age can a baby be placed in the Urban Advantage? Is it safe for infants?The stroller seat is designed to recline into an almost horizontal position, and the footrest can be angled up so that a baby can lie safely in the stroller. The 5-point harness is short enough to fit around a baby. However, we do not recommend using the stroller with an infant younger than 6 weeks-old or placing an infant in the stroller while running, jogging, rollerblading, roller-skating, or similar activities. The main concern is the baby's neck muscles and head control, and the size and development of the baby. Because each baby develops differently, you and your doctor should make final decisions.