Isofix compatible and top tether. Active Head Restraint (AHR): features deeper side wings that shield and contain your child’s head in a side impact crash. It also includes an EPS layer to absorb energy in a crash and to reduce potential injury. Rearward Facing for longer (from birth to 2-3 years of age approx.) Can be used until baby’s shoulders reach the lower shoulder height marker (approximately 12 months of age) OR remain rear facing until they reach the middle height marker (approximately 2-3 years).