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Finally, a car seat that can keep up with your kids. This white and grey marl convertible car seat can be used both front- and rear-facing, accommodating your child through toddlerhood and beyond. It features Koroyd ® technology, developed through aerospace safety research to provide advanced impact protection. The seat is easily and securely installed with the SMARTSecure ® System and tightness and level indicators—so you'll feel confident in your installation. Get unparalleled protection with the multi-directional tether, Active Support Headrest and Energy Response technology. And because messes happen, parents will be glad to know that the fabric cover is removable, washable and free of harmful chemicals.

Check out our Types of Car Seats Guide to learn more.


UPPAbaby ® Knox Bryce White and Grey Marl Convertible Baby Car Seat32.5height18.75width23.75depthMeasurements are in inches.
  • Suitable up to 49" or 65 lbs. (approximately 1–6 years old)
  • Rear-facing from 14–45 lbs. (using the included fit inlay from 14–25 lbs.)
  • Forward-facing from 25–65 lbs.
  • Polyester, plastic and metal
  • Can be used front- or rear-facing
  • Koroyd ® technology is integrated into the base to create an effective crumple zone that protects impact force
  • Multi-directional tether and Energy Response technology for safety and performance
  • Side Impact Pods and Active Support Headrest
  • SMARTSecure ® System with red-to-green tightness indicator for easy installation
  • Bead level indicators
  • 2-piece fit inlay allows for flexibility and proper fit
  • No-rethread harness, 8-position headrest and 4-position recline
  • Color-coded belt paths
  • Removable cup holder included
  • Spot clean
  • Remove cover and machine wash cold, gentle cycle; lay flat to dry
  • Imported

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