Overview
The Nuna AACE Booster is a booster seat designed for children weighing 25–120 lbs and up to 38–57 inches tall. It installs via LATCH + Seat Belt and features True tension LATCH and Adjustable headrest.
In our independent testing, the AACE Booster earned a safety score of 9.4/10 and an overall rating of 9.3/10. It earned our "Best Booster" designation.
Safety Score Breakdown
Based on NHTSA and independent crash test data
How well the harness holds in crash simulations
Ease of correct installation reduces misuse risk
Energy absorption in side-impact scenarios
Pros & Cons
Pros
- Exceptional side-impact protection
- Merino wool fabric option
- Slim profile fits 3 across
- Easy harness adjustment
- Premium build quality
Cons
- Expensive for a booster seat
- No cup holders included
Specifications
| Weight Range | 25–120 lbs |
| Height Range | 38–57 inches |
| Seat Weight | 14 lbs |
| Installation | LATCH + Seat Belt |
| Key Features | True tension LATCH, Adjustable headrest, Side impact protection, Slim profile |
| Price Range | Luxury |
| Category | Booster Seat |
Installation
Installation Method: LATCH + Seat Belt
This seat installs using LATCH + Seat Belt. Always check that the seat moves less than 1 inch at the belt path after installation.
Free inspection available: Visit NHTSA's fitting station locator to find a certified technician near you.
Expert Verdict
The Nuna AACE is the best booster seat for families who want premium safety and comfort. Its slim profile makes it ideal for families who need to fit multiple seats across the back row.