Cybex Eternis S SensorSafe All-In-One Car Seat

Color: Lavastone Black
Sale price$379.95
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The CYBEX Eternis S with SensorSafe™ is the only car seat your child will need from birth and beyond. With three modes - rear-facing, forward-facing and booster, this All-In-One Convertible Car Seat is designed for use from birth up to 120 lbs. This car seat features a patented 3-position reclining headrest that guides your child’s head into a safe and comfortable position, and Linear Side-impact Protection (L.S.P.), which can reduce side impact forces by up to 25% when compared to the same car seat without L.S.P. extended.

With SensorSafe™ car seat safety technology, you'll gain instant insight into your child's well-being—right to the SensorSafe app on your phone. Built into the chest clip of CYBEX car seats, SensorSafe provides alerts when unsafe situations arise including if a child unbuckles themselves; 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.

  • All-In-One Convertible Car Seat offers 10 years of use and 3 Modes - Rear-facing from 4 lbs. to 50 lbs. Forward-facing from 22 lbs. to 65 lbs., Belt-positioning Booster from 40 lbs. to 120 lbs.
  • SensorSafe car seat safety technology uses a Bluetooth enabled chest clip to send mobile app alerts when potential unsafe situations arise (not used in Belt-positioning Booster mode)
  • Adjustable Linear Side-impact Protection (L.S.P. System) absorbs up to 25% more impact forces in the event of a near side impact collision, when compared to the same car seat without L.S.P. extended
  • Patented 3-position reclining headrest helps protect the child’s neck and head in the case of a side-impact
  • In-seat recline provides correct ergonomic positioning and extra legroom, allowing your child to safely ride rear-facing longer
  • 12-position, height-adjustable headrest with an integrated no-rethread harness for protection that grows with your child
  • 6-position one-hand adjustable recline for the best fit to your car
  • Magnetic buckle holders for easy entry and exit from the seat
  • Removable newborn inlay provides additional support for very small babies (4 lbs. to 11 lbs.)
  • Removable cup holder can be positioned on either side and is dishwasher safe for easy clean up
  • Cozy harness pads and 2-position padded buckle for comfort
  • Steel reinforced frame provides strength and durability
  • Energy absorbing shell and base help reduce the forces felt by the child in a collision
  • Dual Belt adjusters to ensure a tight fit
  • Dual-level indicators to help ensure the proper angle
  • Innovative one-pull LATCH removal system
  • LATCH Connection storage provided under the seat when not in use
  • Designed and engineered in Germany


  • Child Age Minimum: newborn
  • Child Weight Minimum: 4 lbs.
  • Child Weight Max: 120 lbs.
  • Rear-Facing Mode Weight Limitation: 4-50 lbs.
  • Rear-Facing Mode Height Limitation: 17-48 in.
  • Forward-Facing Mode Weight Limitation: 22-65 lbs.
  • Forward-Facing Mode Height Limitation: 28"-49"
  • Harness Booster Mode Weight Limitation: 40-120 lbs.
  • Harness Booster Mode Height Limitation: 44"-57"


  • Dimensions: 23.5"D x 19.8"W x 25.5"H
  • Weight: 26 lbs.

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