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Nuna AACE™ Booster Seat

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The innovative nuna® AACE™ Booster Seat features a 3-D growth system, which lets you expand the seat out and up so it grows with your child. With armrests, customizable recline and side-impact protection pods for added safety, this ultra-comfy seat is the best booster for car rides.


  • 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.
  • Ventilation panels within the shell and breathable, washable knit fabric create a comfy climate for even the longest of trips.


  • From pre-schooler to pre-teen, AACE grows right along with your child. Converts from a high back to a no back booster.
  • Adjustable headrest with nine positions and an extendable, expandable seat with eight recline positions to provide your child with comfort and safety.
  • Comfy, built-in arm rests and dishwasher-safe cup holder.


  • Recommended use for high back booster: 40 to 110 pounds | 38 to 60", suggested usage 4 years+.
  • Recommended use for no back booster: 50 to 120 pounds | 38 to 60", suggested usage 5 years+.
  • Imported.


  • Overall (highest position): 22.5" wide x 15" long x 33" high
  • Overall (lowest position): 21.5" wide x 15" long x 26" high
  • Weight: 15.75 pounds


  • Refer to the care label attached to the soft goods for washing and drying instructions.
  • Use only mild detergent, water and a soft cloth to clean the booster seat shell, handle and harness straps. Air dry.
  • Remove the child restraint from the vehicle seat if not in use for a long period of time. Put the booster seat in a cool, dry place and somewhere your child cannot access it.
  • Check regularly if everything functions properly. If any parts are torn, broken, or missing, stop using this product.


  • This item ships directly from our manufacturer so ship times may vary.
  • This item is only available to customers within the contiguous 48 states.

View the complete Shipping and Delivery.


Eligible items can be returned for a refund of the merchandise value within 30 days of receiving an order or 7 days for Quick Ship upholstery items. An original receipt or gift receipt is required.


  • Stores - You can return most non-furniture items to your local Pottery Barn Kids store for free.
  • By Phone - For non-custom furniture and other oversized items, call Customer Service at 1-800-993-4923
  • By UPS - print a return label from our Returns Policy page and
  • bring to a UPS location.


Delivery fees are non-refundable and prior purchases are not eligible for a price adjustment.

  • Monogrammed/Personalized items
  • Made to Order items, including custom rugs and furniture
  • Mattresses
  • Gift cards
  • Final sale items (with prices ending in $.X7 or $.X9)
  • Items damaged through normal wear and tear

View our complete Returns Policy.