No more uncomfortable lifting movements and back pain when helping your child get in or out of the car. The innovative, one-handed 360° swivel mechanism allows for a comfortable entry and exit position, making it significantly easier on parents' backs. Since it is safest for your child to travel facing the rear, the Sirona S guarantees a comfortable rear-facing travel position for children up to 105 cm tall and approximately 4 years old. The direction control prevents forward-facing transport of children under 16 months and those measuring less than 76 cm. Even in the forward-facing position, the Sirona S provides additional safety for your child thanks to its energy reduction technology. This is activated during a frontal collision when the impact force is greatest: the headrest glides down to gradually minimize the impact energy on the neck area and then securely locks into a defined position.