Grow On.
From cute pre-schooler to independent pre-teen — it’s the longest and shortest time, and the Nuna AACE grows right along with your child. Every element, from fabric to foam and beyond, is smartly sourced to be flame resistant with no added fire retardant chemicals.
3D Growth™ System
- Grow up — one-hand 9-position height-adjustable headrest
- Grow out — shoulder system expands simultaneously with the headrest
- Grow on — 3 seat depths give growing legs plenty of support and space
Security
- Energy-absorbing foam and SIP pods for advanced side impact protection
- Belt positioner aids correct shoulder belt routing and minimizes user error
- Colored belt path indicators decrease risk of installation error
- Lower anchor connectors secure the seat to the vehicle during use or transport
Comfort
- 8 recline positions (in high back mode with lower anchor connectors)
- Ventilation panels within the shell for a comfortable climate
- Breathable, machine-washable knit fabric
- Built-in armrests
- Flame-resistant materials with no added fire retardant chemicals
2-in-1 Design
- Converts from high back booster to no-back booster as your child grows
Sleek Details
- Sleek micro-knit fabric — easy to remove and machine washable
- Removable, dishwasher-safe cup holder
What’s Included
- AACE starter kit: cup holder, belt-positioning clip, and set of LATCH guides
Specifications
- High back booster: 40–110 lbs | 38–60" | 4 years+
- No-back booster: 50–120 lbs | 38–60" | 5 years+
- Dimensions: 22.5"H × 12"W × 14.5"L
- Weight: 15.6 lbs
All car seats are final sale. Please read our return and exchange policy before purchasing.
Posh Baby is a family-owned Portland boutique specializing in premium baby gear since 2007. Enjoy tax-free shopping in most states. Local customers receive a complimentary car seat installation appointment with every purchase.
Build Your Baby Registry at Posh Baby
Create your universal baby registry with Posh Baby Portland — and add items from any store in the world. Our expert registry concierge team is here to guide you through every product category, from strollers and car seats to nursery furniture and essentials. Enjoy exclusive registry rewards, tax-free savings in most states, and the confidence of buying from a family-owned boutique that truly knows baby gear.
Universal Baby Registry
When you register with Posh Baby, you can add gifts from our store, Etsy, Amazon, Target, or that little boutique you love — shop small, shop anywhere. Add items regardless of whether your favorite stores even have a website. Our easy-to-manage registry has no limits on what you can add.
One registry. Every store. Endless possibilities.
Boutique Services Offered
Free Car Seat Install
Education Driven Experience
Try Before You Buy
Free Stroller Assembly
Shop tax-free in most states** **exceptions may apply
Loyalty Rewards
1 Point for Every $1 Spent
Earn loyalty points for purchases and other actions, then turn those points into real rewards. We believe in rewarding the families who choose to support us — we don't take your trust for granted.
Thank you for shopping small.
Registry Rewards
Purchase any 3 of the items below — whether you buy them yourself or your guests do — and receive a 5% rebate gift card based on the total of those 3 items. Use it in-store or online.
Mattress Nursing Chair Bassinet Car Seat Stroller Carrier Bouncer
Eligible items must be purchased from Posh Baby. Gift card is issued after qualifying purchases are confirmed.
