The Nuna Aace in Granite is the 2-in-1 booster seat that grows right along with your child — from cute pre-schooler to independent pre-teen. Every element, from fabric to foam and beyond, is flame-resistant with no added fire retardant chemicals, and the 3D Growth™ system ensures a precise fit at every stage. Complimentary car seat safety installations and safety checks by our trained staff for all purchased seats.

3D Growth™ System

The 3D Growth™ system adapts in three dimensions as your child grows: a one-hand 9-position height-adjustable headrest grows up, the shoulder system expands simultaneously with the headrest to grow out, and three seat depths give growing legs plenty of support and space to grow on.

Security & 2-in-1 Design

Energy-absorbing foam and SIP pods provide advanced side impact protection, while a belt positioner aids correct shoulder belt routing and colored belt path indicators decrease the risk of installation error. Lower anchor connectors secure the seat to the vehicle during use or transport. The Aace converts from high back booster to no-back booster as your child grows — high back: 40–110 lbs, 38–60”, 4 years+; no-back: 50–120 lbs, 38–60”, 5 years+.

Comfort & Premium Details

Eight recline positions in high back mode with lower anchor connectors, ventilation panels within the shell, breathable machine-washable knit fabric, and built-in armrests keep every rider comfortable on every journey. A sleek micro-knit fabric cover is easy to remove and machine washable, and a removable dishwasher-safe cup holder completes the package. Every Aace includes the starter kit: cup holder, belt-positioning clip, and set of LATCH guides.

All car seats are final sale. Please read our return and exchange policy before purchasing.

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