NUNA AACE 2-in-1 Booster Car Seat

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  • $199.95
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AACE car seat grows with your baby during vital transition from cute pre-schooler to independent pre-teen, starting as a high-back booster and converting to a backless booster for big kids.

AACE has breathable and washable fabrics, and ventilation panels inside the shell of the seat. Energy absorbing foam and SIP pods take side impact provide top security, while the belt positioner and color-coded indicators minimize the possibility of user error.

Nuna AACE Booster has an adjustable headrest and extendable 8 different recline position with 3 position seat depth that allows your child to grow. AACE car seat is comfortable and safe on long car rides, they’ll enjoy wearing a seat belt just like you do.

AACE Booster Car Seat Features:

  • 3D Growth System: Grow up, grow out, grow on. A 9-position height adjustable headrest, simultaneously expanding shoulder system and seat with 3 depths give growing children plenty of space and support.
  • Recline and Relax: Customizable 8-position recline in high back mode. Ventilation panels within the shell create a comfy climate for even the longest of trips. Cozy, built-in armrests let little arms take a break.
  • Side Impact Protection: Energy absorbing foam and SIP pods take side impact security to the next level.
  • Backless Booster: The 2-in-1 design allows you to convert AACE from a high back to a backless booster.

3D growth™ system

  • 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

2-in-1 design

  • Converts from a high back to a no back booster


  • Energy absorbing foam and SIP pods take side impact security to the next level
  • Belt positioner aids in correct shoulder belt routing and minimizes user error
  • Colored belt path indicators help decrease risk of user error
  • Lower anchor connectors easily secure car seat to vehicle seat during use or transport


  • Customizable recline thanks to 8 different positions*
  • Ventilation panels within the shell and breathable (and washable!) knit fabric create a comfy climate for even the longest of trips
  • Little arms can take a break thanks to cozy, built-in armrests

*in high back mode only when using lower anchor connectors


  • Sleek and chic micro-knit fabric is easy to remove and machine washable
  • Included cup holder is removable and dishwasher safe


  • AACE starter kit includes a cup holder, belt positioning clip and a set of LATCH guides (included with purchase)


  • Dimensions (highest position - HBB): 33 H x 22.5 W x 15 L
  • Dimensions (lowest position - HBB): 26 H x 21.5 W x 15 L
  • Product weight: 15.6 lbs
  • Dimensions (in): 22.5 H x 14.5 L x 12 W

AACE Car Seat Recommended Usage:

High back booster

  • 40–110 lbs | 38–60 in
  • Suggested 4 years +

No back booster

  • 50–120 lbs | 38–60 in
  • Suggested 5 years +

Care Instructions:

Easy to clean

Seat pad:

  • Machine wash on cold
  • Lay flat
  • Air dry
  • Do not use abrasives or bleach


  • Wipe with a damp cloth
  • Air dry

Material Composition:

  • steel
  • plastic
  • polyester

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