Two amazing convertible car seats are available from Cybex, both with the amazing Sensorsafe technology – the Cybex Eternis S and Sirona M car seats. How do they line up?

sirona ma
eternis S
Sirona M SensorSafe Eternis S Sensorsafe
Weight 24.7 lbs

26 lbs

Rear-facing Weight Capacity birth-40 lbs birth-50 lbs
Forward-facing Weight Capacity 22-65 lbs 22-120 lbs
Booster Mode x yes
Headrest Recline x yes
Adjustable Headrest yes yes
 Included Cup Holder  


Inseat Recline yes yes
Newborn Inlay yes yes
Recline Positions 10 positions  6 positions
Price $329.95 $379.95