Eternis S

Protection that Grows

The Eternis S All-In-One car seat offers three stages in one-easy to use car seat, suitable from 4 lbs. up to 120 lbs., or 57 inches tall. First used as a rear-facing infant seat up to 50 lbs., then as a forward-facing convertible seat and lastly as a belt-positioning high-back booster seat. With seamless transitions between modes, the Eternis S offers versatile protection that lasts all the way through your child’s first 10 years of age.

In-Seat Recline

The in-seat recline feature of the Eternis S adjusts to multiple positions, helping to provide a correct ergonomic positioning, a better fit, and extra legroom, allowing your child to safely ride rear-facing longer - up to 50 lbs. The seat comfortably angles the child to help minimize head slump and keep airways open, for a custom, cradled fit.

Integrated Linear Side Impact Protection System (L.S.P.)

The L.S.P. System of the Eternis S extends on the door facing side of the installed car seat and offers increased safety during a side-impact collision. The L.S.P. System reduces the forces of an impact in the event of a side-impact collision by approximately 25% when compared to the same car seat without L.S.P. extended.

3-Position Reclining Headrest

The CYBEX patented reclining headrest helps protect the child’s neck and head in the case of a side-impact. This revolutionary technology safely shifts the balance point of the child's head slightly back and prevents it from falling forward when the child is asleep. In the case of a side-impact collision, the child's sensitive head remains within the safety zone of the seat, ensuring optimal protection. Furthermore, our patented 3-position headrest offers a more comfortable sleeping position for a safe and peaceful journey.

12-Position Adjustable Headrest

The 12-position, height-adjustable headrest of the Eternis S offers comfortable protection as your child grows. The integrated no-rethread harness adjusts with the headrest movement so there’s no need to reconfigure the harness as your child moves up in the seat.

SensorSafe Technology

Offered through select retailers, the Eternis S is also available with SensorSafe Technology built into the chest clip. SensorSafe Technology provides essential alerts when unsafe conditions arise, like if a child unbuckles themselves while the vehicle is in motion; if the back seat has become too warm or too cold, if a child has been seated for too long, and if the driver accidentally leaves the child behind after the vehicle has been switched off. These alerts are provided through an installed vehicle receiver and a user-friendly smartphone SensorSafe App, which also provides guidance on installation, FAQs, a direct line to customer service and more. Select the Eternis S with SensorSafe from your local retailer for this additional safety feature.

Cup Holder Included

The removable cup holder can be positioned on either side and is dishwasher safe for easy cleanup.

Easy Removal

Innovative one-pull LATCH removal system for easy transitions.

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