Safety 1st Complete Air Convertible Car Seat in McKenna is the first car seat to offer Air Protect, revolutionary side impact technology. Complete Air is the first car seat to provide unparalleled protection against the biggest threat to children on the road today - side impact crashes. Through the precise release of air, Air Protect shields children from side impact intrusion and immediately reduces crash forces where the child is most vulnerable - the head. A superior testing method combined with a strict focus on head containment make Air Protect not only a state-of-the-art technology, but a revolution in child safety. In addition to providing superior side impact protection, the Safety 1st Complete Air Convertible Car Seat in McKenna has a secure harness system to ensure the child remains in the car seat. It is also easy to install and proper installation is key to safety. According to Safe Kids, when correctly installed and used, car seats reduce the risk of death by as much as 71 percent for infants. However, as many as four out of five car seats are installed or used incorrectly. Safety 1st Complete Air Convertible Car Seat in McKenna has 2 modes of use rear facing from 5-40 lbs and forward facing 22-50 lbs. The Complete Air revolutionary side impact protection drastically reduces side impact crash forces to the head. The Safety 1st Complete Air Convertible Car Seat comes with the quickfit harness system: adjusts harness height from the front in one easy step! The seat comes with an infant body insert, a removable cup holder, a 5 point harness with up front adjustment.