Baby Trend"s top rated infant car seat, it is for weights between 5 and 30 pounds (2.2 and 13.6kg.) heights of 30" or less (76.2cm). The 5 point safety harness is equipped with easy one-hand harness adjustment and push button release. The 4 position push button height adjustable base has a level indicator for proper installation. The car seat features one-hand easy-access seat release for quick trips in and out of the car off the car seat base. Built into the car seat also includes EPS energy-absorbing foam for superior side impact head protection. The smooth carrying handle features a thoughtfully engineered triangular shape designed to provide the optimal carrying angle for the least strain for the parent. For added comfort, this car seat comes with a removable soft head support. The Flex-Loc refers to the base"s flexible (not rigid) latch straps.