UPPAbaby KNOX Convertible Car Seat

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The KNOX is the first convertible car seat from UPPAbaby. A natural extension in the category after the success of the MESA infant car seat, the KNOX provides a rear-facing and forward-facing solution for parents as their baby outgrows the infant car seat. 

Why Parents Love the KNOX

  • Finally a convertible seat from the beloved UPPAbaby
  • Amazing technology ensures peace of mind

Why Children Love the KNOX

  • Comfortable
  • Cup holder can move to either side
  • Can keep same car seat for years


  • SMARTSecure System: visual red/green indication for correct installation
  • Color coded vehicle belt guides with robust lock offs
  • Energy Response Technology: comprehensive side impact protection
  • Multi-Directional Tether reduces rotation of seat and stress on child's head and neck
  • Tether in both forward and rear facing modes
  • Dual-sided tether bead level indicators
  • 4-position adjustable foot for leveling
  • Koroyd provides superior impact absorption by utilizing technology developed from aerospace safety research
  • In the event of a serious accident, Koroyd’s welded tube structure crumbles instantly and consistently on impact, absorbing more impact force while reducing acceleration
  • Storage pockets keep harness buckles out of way for easy loading
  • Removable + washable seat fabric
  • Included cup holder that can be attached to either side of the seat
  • ERT (Energy Response Technology)
  • (A) Active Response Headrest – utilizes the absorption and recovery properties of foam to deliver side impact protection around child’s head and neck
  • (B) Side Impact Pods on the side of shell combine EPP with a conical absorption feature to disperse forces in the event of a side impact crash. Always engaged, they require no action from the caregiver
  • (C) Impact Dispersion Zone found along the seat shell utilizes EPP to absorb crash forces

Weight Capacity

  • Approximately 1 – 5 years
  • Infant Insert 14 – 25 lbs
  • Rear Facing 14 – 45 lbs
  • Forward Facing 25 – 65 lbs
  • Height up to 49”
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