The Britax Boulevard is an upper model convertible car seat, and one of four of Britax's models which feature the more advanced True Side Impact Protection. This advanced protection is designed to reduce neck and spine injuries by minimizing side-to-side head movement with extra energy-absorbing foam around the head. As in standard side impact protection, the deep side walls with absorbing foam are designed to distribute overall crash forces, shield the baby from vehicle intrusion and contain the head and body. The easy turn knob allows headrest and harness height adjustment without having to uninstall the seat. The 5 point harness ensures a snug and secure tangle free fit, while the LATCH connectors provide easy and tight installation. The Versa-Tether anchors the top of the seat to the vehicle to reduce movement in the event of an impact, and also provides stabalization when used as a rear facing seat. The Boulevard is designed to hold a 5 to 35 pound child sitting 9.5" to 16" high at the shoulder in its rear facing position. For forward facing, it is designed for a 20 to 65 pound 1 year old child sitting 12" to 16" at the shoulder. The Britax Boulevard is available in a wide array of fabric fashions, and is also certified for aircraft travel. Other features include a rear and forward facing recline for child comfort, and a body pillow for positioning.