SKU: 15718366508

Nuna LUMN Harness Booster Seat

Sale price$306.00 Regular price$340.00
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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Description

Nuna LUMN Harness Booster SeatSay goodbye to eye rolls and the 'too old for this' debate. Say hello to a seat that finally speaks their language. The LUMN is a combination seat that matches their big kid style, keeping up with all their growth spurts and bringing the coolness factor. With multiple headrest and recline positions when tethered, this forward facing harness car seat transforms to a belt positioning booster to deliver customized comfort for your child and a tailored

Say goodbye to eye rolls and the 'too old for this' debate. Say hello to a seat that finally speaks their language. The LUMN is a combination seat that matches their big kid style, keeping up with all their growth spurts and bringing the coolness factor.

With multiple headrest and recline positions when tethered, this forward-facing harness car seat transforms to a belt-positioning booster to deliver customized comfort for your child and a tailored fit for your car. Sleek automotive-style leatherette accents create a big kid appeal built to withstand the day-to-day of childhood. It's conveniently wipeable, and the seat pad is machine-washable, making cleanup a breeze.

The LUMN takes them from little kid to bigger kid with a backseat glow-up to see them through all the milestones–with extra points for style.

Use

  • Harness to booster taking them from little kid to bigger kid in stylish security
  • 5-point no-rethread harness stows away when converting to booster
  • 9 recline options in both harness and booster modes when tethered
  • Bubble-free recline guides confirm the perfect riding angle
  • 10-position height-adjustable headrest to accommodate growth
  • Machine-washable fabrics and inserts– seat pad removes separately for added convenience
  • Slim design fits 3 across in most mid-sized vehicles
  • Designed for longevity with up to a 10-year life span
  • Airline approved and FAA-certified for use in harness mode

Safety

  • All-steel frame and reinforced belt path for superior protection
  • Aeroflex™ side impact protection system uses lightweight EPP foam to absorb energy and minimize force transferred during a side-impact collision
  • Certified to latest side and frontal impact standards (FMVSS No. 213a and 213b)
  • True tension™ door for a secure install in harness mode
  • Open belt path provides an easier path for booster-mode buckling
  • Push on latch connectors secure the car seat to the vehicle anchor points

Comfort

  • Ergonomic armrests are padded for extra comfort
  • All-weather micro knit fabric provides all-season comfort
  • Leatherette-wrapped calf support for comfort that grows with them

Premium Details

  • Smart design and long-term security with a coolness factor
  • Sleek automotive-style leatherette accents create a big kid appeal
  • Pop-out cup holders are removable and hand washable
  • Fire-retardant free: from fabric to foam and beyond, each element is smartly sourced to be both flame resistant and contain no added fire-retardant chemicals
  • GREENGUARD Gold Certified: Products that have achieved GREENGUARD Gold Certification are scientifically proven to meet some of the world's most rigorous third-party chemical emissions standards, and certified to not contribute to indoor air pollution or chemical exposure

Recommended Usage

  • To use this child restraint, your child must meet BOTH the weight and height requirements below:
    • Weight: 30-110 lb
    • Height: 34-57 in.
  • In harness mode, child must be at least 30 lbs up to 65 lbs and between 34-49" tall.
  • In booster mode, child must be at least 40 lbs up to 110 lbs and between 43-57" tall.

Specifications

  • Dimensions: 25.5" to 32.5"H x 23.5" to 26.25"L x 18.25"W
  • Product Weight: 26.2 lbs.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15718366508

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4.2 ★★★★★
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Socal Viking
Boise, US
★★★★★ 5
Great shoe seems supportive
Size: 3.5 Big Kid, Color: Black/White
Bought the shoe because it was recommended by a podiatrist for young kids and I'm pleased with what seems like good support.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 15, 2025
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Abby S.
Battle Creek, US
★★★★★ 5
Good fit. Good support. Good for my new runner!
The quality definitely meets our expectations. The price point is pretty good; I can't swallow adult-sized prices for kid-sized shoes. Delivery was early...which my son really appreciated!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 24, 2024
N
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Nick Fitz
Los Angeles, US
★★★★★ 1
Falling apart
Size: 5 Big Kid, Color: Teal/Periwinkle, Size: 5 Big Kid, Color: Teal/Periwinkle
I bought these two weeks ago for my daughter to train and use for a mini triathalon she is doing and the sole tread are already coming apart in several areas. Including the toe. Not worth the money
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
C
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Christina
Lowell, US
★★★★★ 3
Not True “Running” Shoes
Size: 3 Big Kid, Color: Plum/White
Okay every day shoes but not great for running. I’m a small adult, who happens to fit in kid sized shoes. While it has its perks of being cheaper, finding a good supportive shoe in youth size has its challenges. Youth shoes are not always built to last due to the fact kids grow out of them quickly. I had high hopes for these, and bought them on sale. Initially trying them on, they felt great. But after a few runs and miles on them they just weren’t cut out for running. I only ever do a mile here and there. After a month and maybe only 10 miles in them I was experiencing shin splints. So they’re only good for every day errands and I upgraded my running shoes to something else. They do fit true to size though! Was to clean. And very pretty purple.
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Reviewed in the United States on February 7, 2026
L
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latoya favors
Natrona Heights, US
★★★★★ 2
Get 2 sizes smaller! They run big for some reason
Size: 6 Big Kid, Color: Grey/Blue/Citron
This shoe runs super big for a kid sized shoe! Had to purchase 3 times before I got it right!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026

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