The KeyFit infant car seat makes installation simple and secure. With an included stay-in-car base, the lightweight carrier clicks in easily. This base contains a leveling foot and bubble level-indicators to optimize angle in the vehicle seat. Premium LATCH connectors and a SuperCinch tightener create a secure fit. The car seat carrier also includes removable head and body support for newborns as small as 4 pounds. Overall, this car seat ensures the safety and comfort of little ones during travel.