3D TOTAL ADJUST TECHNOLOGY The Viaggio Shuttle Plus can be adjusted in 4 different directions, which are all independent from one another: 1) the headrest 2) the upper backrest 3) the side wings Integrated rigid LATCH allows for easy installation and stability. The rigid LATCH can also tuck into the seat when it is not in use. BLIND LOCK ATTACHING SYSTEM Prevents the car seat from being accidentally released by another passenger REMOVABLE BACKREST When your child is ready for a backless booster, the Shuttle Plus easily transforms into a backless booster with the push of a button SIP All Side Impact Protection protect's child's head, neck and spine. The wide curving headrest and broad backrest with adjustable side wings help protect against side collisions