No more uncomfortable lifting movements and back pain when helping your child get in or out of the car. The innovative one-handed 360° rotating 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 backwards, the Sirona S guarantees a comfortable rear-facing travel position for children up to 105 cm tall. The direction control prevents the forward-facing transport of children under 16 months and those measuring 76 cm or less. Even in the forward-facing position, the Sirona S provides additional safety for your child thanks to its energy reduction technology. This technology is activated during a frontal collision when the impact force is at its highest: the headrest slides down to gradually minimize the impact energy on the neck area and then securely locks into a defined position.