Nuna LUMN Car Seat

The Nuna LUMN is the combination car seat built for the long haul — carrying your child from 30 lbs all the way to 110 lbs with a seamless transition from a 5-point harness seat to a belt-positioning booster. With a 10-year lifespan and sleek automotive-style leatherette accents, it's the last combination seat your family will ever need to buy.

Why Our Team Recommends the Nuna LUMN

Road-tested in our boutique, the LUMN is the seat we reach for when parents ask about the best long-term investment in child passenger safety. The no-rethread harness adjusts without any hardware changes as your child grows, and the 9-position bubble-free recline confirms the perfect riding angle every time — in both harness and booster modes when tethered.

Slim Enough to Fit 3 Across

The LUMN's thoughtfully engineered slim profile fits three seats across in most mid-sized vehicles — a detail that makes it an exceptional choice for growing families navigating the three-child challenge. At 30–65 lbs in harness mode and 40–110 lbs as a belt-positioning booster, it covers more of your child's car seat years than almost any other seat on the market.

FAA Certified & Built to Last

FAA certified for use in harness mode on aircraft, the LUMN travels with your family wherever life takes you. The machine-washable seat pad and inserts, wipeable leatherette accents, and 10-year lifespan make it as practical as it is premium.

Complimentary Car Seat Installation with Every Purchase

Every Nuna LUMN purchased at Posh Baby includes complimentary car seat safety installations and safety checks by our trained staff. As an authorized Nuna dealer, we back every seat with full manufacturer warranty coverage and personalized guidance for your specific vehicle.

Posh Baby is a family-owned Portland boutique specializing in premium baby gear since 2006. Enjoy Tax-Free shopping in most states.