Gravity meets and exceeds the higher crash testing requirements of the i size legislation ece r129 it has an adjustable headrest with 5 positions the headrest can be adjusted to suit the babys height the height adjustment mechanism can be used while the baby is in the seat fitted harness and headrest that provide synchronised adjustment 5 point harness that spreads the loads across the body better in the event of an accident for newborn babies up to 60cm fitted with a cushion insert to