Nuna LUMN Harness Booster Seat is Nuna's first forward-facing harness booster — transitioning from a 5-point harness car seat (30–65 lbs) to a belt-positioning booster (40–110 lbs) — with GREENGUARD Gold certification, no fire-retardant chemicals, and a slim 3-across fit for most mid-sized vehicles.

The LUMN features Aeroflex™ SIP pods for side-impact protection, a 10-position height-adjustable headrest, 9 recline positions, True Tension™ doors for harness mode, and a 10-year lifespan design. FAA-certified in harness mode for air travel, and machine-washable fabrics throughout.

Key Features

• Harness to booster: 5-point no-rethread harness stows away when converting to belt-positioning booster mode
• GREENGUARD Gold certified: World's most rigorous chemical emissions standards
• Aeroflex™ SIP pods: Lightweight EPP foam absorbs energy and minimizes side-impact force
• 10-position height-adjustable headrest: Accommodates growth in both modes
• 9 recline options: Available in both harness and booster modes when tethered
• Slim 3-across fit: Designed for most mid-sized vehicles
• True Tension™ door: Muscle-free, secure LATCH installation in harness mode
• 10-year lifespan: Built for longevity — one seat through multiple stages
• FAA-certified: Aircraft-approved in harness mode
• Machine-washable fabrics: Seat pad removes separately for easy cleaning
• All-weather micro-knit fabric: All-season comfort
• No fire-retardant chemicals: Flame-resistant without chemical additives

Specifications

• Harness mode weight limit: 30–65 lbs; 34–49 in
• Booster mode weight limit: 40–110 lbs; 43–57 in
• Overall range: 30–110 lbs; 34–57 in
• Age/size range: Approximately 3 years through booster age

Compatibility

Self-contained harness booster seat. Installs with lower anchor LATCH in harness mode; vehicle seat belt in both modes. FAA-certified in harness mode for aircraft use.

What's Included

• LUMN harness booster seat
• Pop-out cup holders

Safety & Certifications

• GREENGUARD Gold Certified
• Certified to FMVSS No. 213a and 213b (latest side and frontal impact standards)
• FAA-certified for aircraft use in harness mode
• No added fire-retardant chemicals
• Aeroflex™ Side Impact Protection (SIP)
• All-steel frame with reinforced belt path