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.