The LUMN Harness to Booster Car Seat is designed to grow with your child, combining advanced safety, long-term usability, and a modern design that matches big kid style. Engineered with an all-steel frame and premium materials, it transitions seamlessly from a forward-facing harness seat to a belt-positioning booster, delivering comfort, protection, and practicality for every stage. Its slim profile, easy-clean fabrics, and adjustable features make it a smart solution for families looking for durability and everyday convenience.

Why choose the LUMN Harness to Booster Car Seat

1. Grows with your child from harness to booster
   Seamlessly transitions from a 5-point harness to a belt-positioning booster, supporting multiple growth stages with one investment
   
   
2. Advanced safety with reinforced structure
   All-steel frame and reinforced belt path provide superior protection and long-lasting durability
   
   
3. Custom comfort with multiple adjustments
   Features 10 headrest positions and 9 recline options when tethered for a precise and comfortable fit
   
   
4. Slim design for better vehicle compatibility
   Fits 3 across in most mid-sized vehicles, ideal for families needing space optimization
   
   
5. Premium materials with easy maintenance
   Wipeable leatherette accents and machine-washable seat pad simplify everyday cleaning
   
   
6. Certified safety and clean materials
   FAA approved in harness mode, meets latest impact standards, and made without added fire-retardant chemicals
   
   
7. Designed for long-term use
   Up to 10-year lifespan, ensuring extended usability through multiple growth phases

Characteristics / What’s included / Technical specifications

Features

• Harness to booster convertible design
  
• 5-point no-rethread harness that stows away in booster mode
  
• 10-position height-adjustable headrest
  
• 9 recline positions in both harness and booster modes when tethered
  
• Bubble-free recline guides for accurate positioning
  
• Slim design fits 3 across in most mid-sized vehicles
  
• Machine-washable seat pad and removable inserts
  
• Pop-out cup holders, removable and hand washable

Safety

• All-steel frame with reinforced belt path
  
• Aeroflex™ side impact protection system with EPP foam
  
• Certified to FMVSS No. 213a and 213b standards
  
• True tension™ door for secure installation in harness mode
  
• Open belt path for easier booster-mode buckling
  
• Push-on latch connectors for secure attachment
  
• FAA certified for aircraft use in harness mode
  
• No added fire-retardant chemicals

Comfort

• Padded ergonomic armrests
  
• All-weather micro knit fabric for year-round comfort
  
• Leatherette-wrapped calf support for extended comfort

Premium details

• Automotive-style leatherette accents
  
• GREENGUARD Gold Certified for low chemical emissions
  
• Durable materials designed for everyday use

Recommended use

• Weight: 30–110 lbs
  
• Height: 34–57 inches

Harness mode

• Weight: 30–65 lbs
  
• Height: 34–49 inches

Booster mode

• Weight: 40–110 lbs
  
• Height: 43–57 inches

Dimensions

• Highest position: L 26.25 in x W 18.25 in x H 32.5 in
  
• Lowest position: L 23.5 in x W 18.25 in x H 25.5 in

Weight

• 26.2 lbs