The Nuna Lumn in Granite is Nuna’s first harness booster seat — a forward-facing harness car seat that transforms into a belt-positioning booster as your child grows. One seat, two stages, built for the long haul. Complimentary car seat safety installations and safety checks by our trained staff for all purchased seats.

Two Stages, One Seat

In harness mode, a five-point no-rethread harness keeps little ones secure and stows away cleanly when converting to booster mode. Nine recline options in both harness and booster modes when tethered, with bubble-free recline guides to confirm the perfect riding angle, and a 10-position height-adjustable headrest that accommodates growth through both stages. Slim enough to fit three-across in most mid-sized vehicles, and FAA certified for aircraft use in harness mode.

Built for Longevity

Machine-washable fabrics and inserts — the seat pad removes separately for easy cleaning — and a design built for up to a 10-year lifespan make the Lumn a smart long-term investment. Harness mode: 30–65 lbs, 34–49”. Booster mode: 40–110 lbs, 43–57”. Overall range: 30–110 lbs, 34–57”. Child must meet both weight and height requirements for each mode.

All car seats are final sale. Please read our return and exchange policy before purchasing.

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