Nuna Booster Seats with Back: AACE, LUMN, and EXEC Comparison Guide

When it comes to combining style, comfort, and safety for your growing child, Nuna leads the way. With an expertly engineered lineup of high-back booster seats—including the AACE, LUMN, and EXEC—Nuna offers smart solutions that adapt as your child grows. Each seat is uniquely designed to meet your family’s lifestyle, ensuring your child rides in luxury without compromising on safety.

Nuna AACE Booster Seat

The Nuna AACE is built to adapt with your child from preschool to preteen. Its 3D growth system includes:

8-position adjustable headrest
Expandable shoulder system that grows with your child’s height
3-position seat depth for leg comfort
Energy-absorbing foam and side impact protection
Belt-positioning booster mode (40–110 lbs)
Greenguard Gold Certified and flame-retardant free

Perfect for families looking for a lightweight, stylish, and highly adjustable booster with a simple belt-positioning setup.

Nuna LUMN Booster Car Seat

The LUMN is Nuna's latest innovation, offering a harness-to-booster solution ideal for kids transitioning from toddler to big kid. Key highlights include:

5-point harness mode (30–65 lbs) and booster mode (40–110 lbs)
9 recline positions for customized comfort
10-position height-adjustable headrest
All-steel frame with Aeroflex™ side impact protection
Machine-washable seat pad and fabrics
Slim fit design (fits 3 across in most vehicles)
FAA certified in harness mode
Fire-retardant free and Greenguard Gold Certified

Perfect for parents who want a car seat that grows with their child, with superior safety and sophisticated aesthetics.

Nuna EXEC All-in-One Car Seat

The EXEC is Nuna's all-in-one luxury solution, going from rear-facing infant seat to forward-facing harness and then to a belt-positioning booster. It offers:

Rear-facing (5–50 lbs), forward-facing harness (25–65 lbs), and booster mode (40–120 lbs)
Steel frame and Aeroflex™ foam for top-tier safety
10-position recline and 12-position headrest
Integrated anti-rebound panel and leg rest
Merino wool and TENCEL™ blend fabrics
GREENGUARD Gold Certified and flame-retardant free

Ideal for families who want one premium seat from birth through booster years.

Which Nuna Booster Seat Is Right for You?

AACE: Best for older kids ready for a high-back booster with belt-positioning only.
LUMN: Ideal for those transitioning from harness to booster and needing a sleek, high-safety design.
EXEC: A premium all-in-one seat that covers every stage from newborn to booster.