
A booster seat that converts from high-back to backless as the kid grows
Is this the right fit?
- Best for
- for families sizing up from a harnessed seat, carpools, and three-across back seats
- Skip if
- Belt fit is generally better in high-back mode, so moving to backless too early can compromise how the belt sits
- Check before ordering
- Confirm the dimensions, exact model, included parts and return terms on the Amazon listing before ordering.
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The Diono Cambria LE is a belt-positioning booster that works in two configurations: high-back for younger or smaller children who need head and torso support, and backless once they have outgrown that stage. Because it covers 40 to 120 pounds, it can be the last car seat a child needs rather than a stage to be replaced in two years. Six headrest positions adjust as they grow, and Latch connectors keep the booster anchored to the vehicle when it is empty, which stops it becoming a projectile in a crash. At 17 inches wide it is on the narrower side, which matters when fitting three seats across. Best fit for families sizing up from a harnessed seat, carpools, and three-across back seats.
Pros
- Converts from high-back to backless, covering both booster stages in one seat
- Rated 40 to 120 pounds, so it lasts through the full booster age range
- Six headrest positions adjust as the child grows taller
- Latch connectors keep the booster secured to the vehicle when unoccupied
- 17 inches wide, which helps when fitting three seats across a back seat
Cons
- Belt fit is generally better in high-back mode, so moving to backless too early can compromise how the belt sits
Frequently asked questions
When can my child switch to backless mode?
Backless is for older, taller children who no longer need head and torso support and where the vehicle provides adequate head restraint. High-back mode usually gives better belt fit, so most guidance is to stay in it as long as it fits.
Does it fit three across?
At 17 inches wide it is narrower than many boosters, which helps in a three-across configuration, though the outcome depends on your specific vehicle and the other seats.
What is the Latch for on a booster?
A booster is held by the vehicle's seat belt when in use. Latch keeps the empty booster anchored so it does not become a loose projectile in a crash.
What size child does it fit?
It is rated for children from 40 to 120 pounds, which covers the typical booster years from roughly age 4 through the tween stage.







