Nuna's preferred installation method is the Vehicle Seat Belt as it eliminates confusion of when to switch from Lower Anchors to Vehicle Seat Belt, fits more vehicle makes, and fits more seating positions. From fabric to foam and beyond, each element is smartly sourced to be both flame resistant and contain no added fire retardant chemicals, All steel frame and reinforced belt path for superior protection, Adjustable anti-rebound panel and leg rest combination provides extended rear facing comfort and gives additional leg room forward facing. Children can remain rear facing up to a whopping 50 lbs.