This is a convertible car seat for rear facing children from 5 - 35 lbs and forward facing up to 65 lbs. The radian premier features a steel alloy frame, 4 panel side impact protection and a unique energy absorbing harness system. The detachable base simplifies rear facing installations and its low side profile makes child boarding a breeze. Radian's unique design offers 3" more shoulder room inside than any other seat in its class and can fit 3 across the back seat of a car. Includes full body support cushions for infants that convert to height adjustable head cushions for older kids. All this and it folds to just 7". Attach the shoulder straps and carry it over your shoulder or on your back.