This is a harness/belt positioning car seat that is designed to fit toddlers through big kids. All you have to do is adjust from a five-point harness to vehicle seat belt. There are 9 headrest positions to guarentee a perfect fit for any traveler. It also has a 4 position recline to support a proper posture. As well as an extra deep ErgoBoost seat with dual density foam padding for extra comfort. DuoGuard side impact protection offers extra safety. The seat shell is reinforced with a steel frame for superior protection. The installment of this carseat is so easy with primium LATCH connectors and a LockSure belt tightening systrm with wide routing to make it easy to achieve a tight and secure fit.