Nuna AACE Fire-Retardant Free Booster Seat is a 2-in-1 highback and no-back booster rated 40–120 lbs — built without any added fire-retardant chemicals, making it one of the safest booster seats available for children ready to transition to a vehicle seat belt.

The AACE's 3D Growth™ system expands in three directions simultaneously as your child grows — up via the 9-position adjustable headrest, out via the shoulder system, and forward via three seat depths. Eight recline positions (in high-back mode) and built-in armrests keep kids comfortable on even the longest trips. GREENGUARD Gold certified.

Key Features

3D Growth™ system: Headrest, shoulder, and seat depth all expand simultaneously as your child grows
9-position height-adjustable headrest: One-handed adjustment; shoulder system adjusts with it
3 seat depth settings: Grows to provide leg support as child gets taller
2-in-1 design: Converts from highback booster to no-back booster
8 recline positions: Customizable angles in high-back mode (with lower anchor connectors)
SIP pods: Energy-absorbing foam and Side Impact Protection pods
Belt path indicators: Colored guides minimize shoulder belt routing errors
Lower anchor connectors: Secures to vehicle seat during use and transport
Built-in armrests: Cozy resting place for little arms on long trips
Ventilation panels: Breathable knit fabric and shell ventilation for all-trip comfort
Machine-washable fabric: Micro-knit fabric is easy to remove and machine washable
Removable, dishwasher-safe cup holder: Included with purchase

Specifications

High-back booster weight limit: 40–110 lbs; 43–57 in; suggested 4 years+
No-back booster weight limit: 50–120 lbs; 43–60 in; suggested 5 years+
Product weight: 15.6 lbs
Dimensions: 26"H × 15"D × 21.5"W
Age/size range: Approx. 4 years through booster age

Compatibility

Self-contained booster seat for use with vehicle's seat belt system. Lower anchor connectors keep it secure in the vehicle. Compatible with standard 3-point vehicle seat belts and lower anchor (LATCH) systems.

What's Included

AACE highback booster seat
Cup holder
Belt positioning clip
Set of LATCH guides

Safety & Certifications

GREENGUARD Gold Certified
No added fire-retardant chemicals — flame-resistant materials without chemical additives
Energy-absorbing foam and SIP pods for side-impact protection
Colored belt path indicators minimize routing errors
Meets FMVSS 213 standards

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