Nuna AACE™ Booster Car Seat

Article number: Nuna CS-40-001
Availability: Call Store 605-343-8722
Delivery time: Allow 5-7 Days, Based on Availability


With nine head and shoulder positions, as well as three seat depths and eight recline positions, this streamlined booster seat is designed to grow comfortably with your child.

Why parents will love it: The easy-to-adjust style grows with your child, offering nine height positions, an adjustable headrest and 3D adjustable shoulder system that spreads out. The seat sports three seat depths for growing legs, and converts from a high-back to a backless booster.

Why kids will love it: Ventilation panels help regulate temperature, and built-in armrests provide comfortable support. A removable cupholder is within easy reach for snacks or drinks and is dishwasher safe for easy cleaning.

Child weight/height: Ages 4 and up; 40–80 lb. high-back booster; 50–120 lb. backless booster; up to 60”.

Car seat weight/dimensions: 22 1/2" x 14 1/2" x 12".

Safety features: Energy-absorbing foam and SIP pods take side-impact security to the next level.

Harness: A belt positioner with a colored path ensures correct strap routing, decreasing risk of user error.

Car installation: Lower anchor connectors easily secure car seat to vehicle seat.


  • 3D Growth System (see below)
  • 2-in-1 design
  • customizable recline with one-hand, 9 position headrest
  • side impact protection (SIP) pods
  • comfy, built-in arm rests
  • included dishwasher-safe cup holder
  • included AACE starter kit


The 3D Growth System is...

  • grow up | one-hand, 9 position height adjustable headrest
  • grow out | shoulder system works simultaneously with the headrest, expanding out while growing up
  • grow on | seat sports 3 depths giving growing legs plenty of support and space
  • converts from a high back to a no back booster
  • energy absorbing foam and SIP pods take side impact security to the next level
  • lower anchor connectors allow for 8 position recline in high back mode & easily secure car
  • seat to vehicle seat during use or transport
  • belt positioner aids in correct shoulder belt routing and minimizes user error
  • colored belt path indicators help decrease risk of user error
  • ventilation panels within the shell and breathable (and washable!) knit fabric create a comfy
  • climate for even the longest of trips



  • recommended use for high back booster: 40 to 110 lbs | 38 to 60 in., suggested usage 4 years +
  • recommended use for no back booster: 50 to 120 lbs | 38 to 60 in, suggested usage 5 years +
  • overall seat dimensions (highest position): 33"H x 22.5"W x 15"D
  • overall seat dimensions (lowest position): 26"H x 21.5"W x 15"D
  • product weight: 15.6 lbs.
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