Infant - only car seats with three - or five - point harness systems or convertible car seats with five - point harness systems provide the best comfort and positioning for your baby. (chop.edu)
Most infant - only car seats feature a stay - in - car base that makes it easy to carry a baby around in the car seat while outside the vehicle. (thespruce.com)
Infant - only car seats only face the rear of the vehicle. (thespruce.com)