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Nuna

Nuna LUMN Harness Booster Car Seat

Nuna LUMN Harness Booster Car Seat

Regular price $680
Sale price $680 Regular price
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Color|Granite
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Booster with harness for the little-big kids.

The Nuna LUMN Harness Booster Car Seat is a 2-in-1 forward-facing car seat designed to grow with your child, converting from a 5-point harness booster to a belt-positioning booster for extended use. Built with Nuna’s signature premium materials and thoughtful design, LUMN delivers long-lasting comfort, safety, and value.

Engineered for secure installation and everyday ease, the LUMN features advanced safety elements to support your child through multiple growth stages. Its adjustable design ensures a proper fit as your child grows, while the refined, durable construction reflects Nuna’s commitment to quality and performance.

Ideal for families seeking a harness-to-booster car seat that balances safety, comfort, and longevity, the Nuna LUMN offers a reliable solution for forward-facing travel.

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Product Specs

Rear Facing: Rear Facing With seat belt: 5-50 lbs. / With lower anchor belt: 5-30lbs. / Height 18-49 in.

Forward Facing: With seat belt: 30-65 lbs. / With lower anchor belt: 30-40 lbs. / 34-49 in.

Belt Positioning Booster: 40-110 lbs. / Height 43-57 in., 4 years +

Dimensions: L 22.5 x W 18.5 x H 26–33

Seat Weight: 26.6 lbs

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Nuna LUMN Harness Booster Seat Features:

  • Styled with leatherettes that mimics luxury automotive interiors that'll match the interior of your car
  • Ditch the bulk, small enough to fit 3 across
  • One of the few harness to booster seats available to safely transition your little one from little to big kid
  • All-steel frame offers superior protection in addition to their reinforced belt path

Nuna LUMN Harness Booster Car Seat Safety Features:

  • All-steel frame and reinforced belt path for superior protection
  • 5 point no-rethread safety harness
  • More protection with their Aeroflex side impact protection system uses lightweight EPP foam to absorb energy and minimize force transferred in the event of a side-impact collision
  • Certified for the latest side and frontal impact safety standards (FMVSS No. 213a and 213b) ahead of the mandatory dates
  • True tension door for a secure install in harness mode
  • Open belt path for an easier booster-mode buckling
  • Push on latch connectors to secure the car seat into the vehicle anchor points

Nuna LUMN Harness Booster Car Seat Comfort Features:

  • Ergonomic armrests provide extra comfort for your little kid as they grow
  • 10-position height-adjustable headrest to accommodate growth
  • All-weather micro knit fabric provides comfort throughout the year through all the seasons
  • Calf support is wrapped with leatherette to provide comfort for growing little ones
  • Keep them hydrated with pop-out cup holders that are removable and hand washable
  • Fire-retardant free from fabric to foam and beyond with each element being sourced carefully to be flame resistant without the harsh chemical additives 

LUMN Harness Booster Car Seat Recommended use:

Prior to using this Harness Booster Car Seat the following weight and height requirements must be met:

  • Weight: 30-110 lbs
  • Height: 34-57" in

Harness Mode:

  • Weight: 30-65 lbs
  • Height: 34-49" in

Booster Mode:

  • Weight: 40-110 lbs
  • Height: 43-57" in

LUMN Harness Booster Car Seat Specifications:

  • Car seat dimensions (highest position):  L 26.25" x W 18.5" x H 32.5" inches
  • Car seat dimensions (lowest position): L 23.5" x W 18.25" x H 25.5" inches 
  • Product weight: 26.6 lbs
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Regular price $680
Sale price $680 Regular price
Sale