The Nuna Aace in Caviar 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.
Posh Baby is a family-owned Portland boutique specializing in premium baby gear since 2006. Enjoy Tax-Free shopping in most states.
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.
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Boutique Services Offered
Free Car Seat Install
Education Driven Experience
Try Before You Buy
Free Stroller Assembly
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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
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