Diono Cambria 2 XL 2-in-1 Booster Car Seat
- Weight Capacity: 120 pounds
- Orientation: Forward Facing
- Age Range: Kid
- Installation: Seat Belt
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
With a 120 pound limit and belt-only install, this Diono seat is built to carry an older forward facing child for the long haul rather than serve as an infant seat.
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ASIN: B09HY4GNLJModel: 31210Category: Child Car Seats
Overview
The Diono 31210 is a forward facing seat rated for kids up to 120 pounds, installed with the vehicle's seat belt rather than LATCH. Its frame mixes alloy steel, aluminum, plastic and polyethylene, and the seat weighs 12.8 pounds.
A 120 pound weight limit paired with seat belt only installation points to a seat built for an older child who has outgrown a harnessed seat, not an infant or toddler seat. That high ceiling means it can stay in use for years without a new purchase. Because it installs with the existing seat belt, moving it between cars does not require LATCH anchors.
- 120 lb weight capacity
- Forward facing orientation
- Seat belt installation
- 12.8 lb seat weight
Who it's for
Suited to families with a child old enough and heavy enough to ride forward facing up to 120 pounds. Not a fit for infants, rear facing needs, or households wanting LATCH installation.
Pros and cons
- Rated to 120 pounds so it lasts through the forward facing years
- Seat belt install works in vehicles without LATCH
- Alloy steel and aluminum add structure without excess weight
- Forward facing only, no rear facing option
- No LATCH connectors, only seat belt installation
Performance notes
The metal and plastic frame combination is built to handle a child up to 120 pounds while keeping the seat itself at 12.8 pounds, light enough to move between cars. Installation relies on threading the vehicle's own seat belt through the seat rather than clicking into LATCH anchors, which works in any car with a working lap and shoulder belt.
Specifications
| Brand | Diono |
|---|---|
| Model | 31210 |
| Dimensions & fit | |
| Weight Capacity | 120 poundshigher than 79% of 72 child car seats |
| Orientation | Forward Facing |
| Item Weight | 12.8 poundslower than 62% of 99 child car seats |
| Capacity & performance | |
| Age Range | Kid |
| Construction & materials | |
| Material | Alloy Steel, Aluminum, Plastic, Polyethylene |
| Compatibility & installation | |
| Installation | Seat Belt |
Closest rivals on specs
Britax Skyline 2-Stage Booster Car Seat- Item Weight 12.8 vs 11 pounds (+16%)
Baby Trend Protect 2-in-1 Booster Seat- Item Weight 12.8 vs 10.4 pounds (+23%)
Frequently asked questions
What is the weight limit on the Diono 31210?
It is rated for children up to 120 pounds.
How is the Diono 31210 installed?
It installs using the vehicle's seat belt rather than LATCH connectors.
Does the Diono 31210 face forward or backward?
It is a forward facing only seat.