Nuna® AACE™ Booster Car Seat


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Nuna® AACE™ 2-in-1 High Back Booster Car Seat

Introducing the Nuna AACE booster car seat. Drum roll, please.... It's not just any booster car seat. It's Nuna's 2-in-1, high-back 3D Growth™ System booster, designed to grow with your child. In fact, the AACE is coined the "grow-volution", allowing us all to rethink the way a car seat grows with our child... You'll be amazed to know that the AACE grows in three different ways:

  • Grows up, with a one-hand, 9 position height-adjustable and comfortable headrest
  • Grows out with a shoulder system that expands out while growing up, working simultaneously and harmoniously with the headrest 
  • Grown on with a base seat that sports 3 varying depths, giving your precious one's growing legs ample amount of space and support

And the 2-in-1 design of the AACE turns from a high-back booster to a no-back booster in a breeze!

Enjoy as a high back booster from 40-110 lbs. or 38-60 inches, suggested by Nuna at 4 years and older.  And sport as a no-back booster from 50-120 lbs. or 38-60 inches, suggested by Nuna at 5 years and older. 


  • Customizable recline with 8 different positions in high back mode, utilizing the seat's lower anchor connectors
  • Side impact protection that's of just another level, above and beyond other booster seats. Enjoy the added peace of mind of complete and advanced SIP protection, energy absorbing foam, and SIP pods, all designed to enhance the safety and security of your precious one
  • Ventilation panels within the seat's shell that create an airy, comfortable climate for your child on long and short trips alike
  • Built-in belt positioner and colored belt path indicators help guide shoulder belt routing, minimizing user oversight and confusion
  • Lower anchor connectors seamlessly secure the AACE to the vehicle seat during use or transports
  • Chic, stylish micro-knit fabric is comfortable to the touch and removes for a quick and easy machine wash
  • Built-in comfortable arm rests on both sides of the seat
  • Includes dishwasher-safe cupholder that you can easily remove and give a quick wash

The AACE booster seat is available in these fashion options:

  • Caviar
  • Granite
  • Lake
  • Lagoon
  • Seafoam
  • Coral


  • Shipping dimensions: 22.3 lbs., 36.6"H x 20.5"L x 10.2"W
  • Open Product dimensions: 15.6 lbs., 26"H x 15"L x 21.5"W
  • Nuna's Manufacturer Warranty from defects 2 years

Recommended Uses:

  • As a high-back booster, use from 40–110 lbs, 38-60 inches. Suggest use at 4+ years
  • As a no-back booster, use from 50-120 lbs, 38-60 inches. Suggest use at 5+ years

What's Included:

  • AACE Car Seat
  • AACE Start Kit (includes one cupholder for child, belt positioning clip, a set of latch guides)



3 Reviews Hide Reviews Show Reviews

  • 5
    Extremey fast shipping

    Posted by Alex on 01 19 2024

    Very pleased with the transaction and the delivery speed. Our little one likes the car seat very much !

  • 5
    Wonderful booster that grows with child

    Posted by Kimberly Schneider on 07 28 2023

    Great booster. Easy to install. Grows with child. Another great Nuna product

  • 5
    2021 Nuna AACE Booster Carseat (Granite)

    Posted by Gloria McCoy on 04 09 2021

    This is a great carseat. So nice, I had to order a second one for my other granddaughter. And the color matches perfectly in their vehicle. So glad I purchased these carseats for them and they love them as well!