Nuna's innovative RELX base is one of the first to feature an adjustable stability leg to fit in center seating positions and a wider range of vehicles. It also features a strong steel-reinforced rigid latch that has four lockable positions to achieve a closer fit of the base against your vehicle seat. Colored indicators take the guesswork out of installation, and the bubble-free, numbered, on-the-go recline means you can change positions as your baby grows without having to uninstall the base. The lockoff with easy-access belt path makes it simple to install with the vehicle belt. The smooth platform won’t take a toll on your vehicle seats, and the low profile allows for easier loading of any Nuna PIPA series infant car seat.