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Sirona S™

The NEW CYBEX Sirona S is the first Convertible Car Seat in the U.S. to feature an innovative 360° rotatable seat with a load leg, making switching between rear-facing and forward-facing positions quick and easy. The Sirona S load leg stabilizes the seat and can significantly reduce crash forces. These features, combined with an EasyLock™ bar for quick, simple and secure installation, offer advanced safety protection for children — and greater peace of mind for parents.



•Innovative, one-hand 360° rotatable seat allows parents to easily get their child in and out

•Load leg stabilizes the car seat and can reduce rotation in certain crashes by up to 30%

•Only Convertible Car Seat in North America with a one-time vehicle belt installation for both rear-facing and forward-facing mode•EasyLock™bar reduces force needed up to 4x for quick, simple and secure installation

•Smart-tech harness chest clip with SensorSafe™technology alerts parents if their child becomes unbuckled, the car temp gets too warm or unsafe conditions arise*

•12-position recline adjustment even while seat is in use

•Linear Side-impact Protection absorbs up to 25% more impact in a collision**

•Anti-rebound design reduces car seat rebound movement

•Magnetic buckle holders make entry and exit from the seat a breeze

•Dishwasher safe cup holder can be positioned on either side of seat

•12-position, height-adjustable headrest with no-rethread harness

•Dual-level indicators help ensure the proper car seat angle

•Steel reinforced frame provides strength and durability

•Harness pads and 3-position padded buckle provide extra comfort

•Removable newborn insert provides support for small babies

•Innovative one-pull LATCH removal system

•LATCH Connection storage inside the base when not in use

•Rear-facing from 4 lbs. to 50 lbs. Forward-facing from 22 lbs. to 65 lbs.

*SensorSafe is compatible with most vehicles 2008 or newer with an OBD II port. For some electric vehicles, contact CYPBEX as an additional adapter may be needed.

Cybex Sirona S w/ SensorSafe

Excluding Sales Tax |
Carseat Color
  • Measurements: 30”D x 19”W x 24”H

    Weight: 30.4 lbs.

    Use from Birth up to 65 lbs. or 49 inches, following the directions in your user manual

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