
Best for safety conscious parents who want a single high quality seat to last from birth to middle school
- 10 year lifespan from 5 to 120 pounds
- Built-in cooling channels for airflow
- Steel reinforced frame
Head to head · Car Seats
Ravvy scores One4Life All in One Car Seat at 93.26 and Graco® 4Ever DLX 4-in-1 at 93.45. Graco® 4Ever DLX 4-in-1 takes the overall pick, best for parents seeking a one-and-done investment for a single vehicle.

$430
The Britax One4Life is the gold standard for installation ease and longevity, provided you do not mind its heavy frame and premium price point.
Ravvy pick

$320
Buy this seat if you want to avoid purchasing multiple products over a decade, provided you are comfortable with a heavy frame that stays installed in one car.
| Factor | One4Life All in One Car Seat | Graco® 4Ever DLX 4-in-1 |
|---|---|---|
| Longevity | 98 | 99 |
| Portability | 40 | 60 |
| Fabric Quality | 94 | – |
| Installation Ease | 99 | 88 |
| Safety Engineering | 97 | – |
| Versatility | – | 98.5 |
| Safety Features | – | 95 |
What owners praise
What to know first
Skip it if families who frequently switch seats between cars or travel by air
What owners praise
What to know first
Skip it if families who frequently switch seats between multiple cars or travel by air
| Spec | One4Life All in One Car Seat | Graco® 4Ever DLX 4-in-1 |
|---|---|---|
| UPC | 652182750688 | 047406190683 |
| ASIN | B0FY4868XJ | B0DHLRX6DW |
| Brand | Britax | Graco |
| Color | Parchment | Maddox 2.0 |
| Unit Count | 1 Count | 1 Count |
| Item Weight | 30 pounds | 23 pounds |
| Orientation | Rear and Forward Facing | Forward Facing |
| Part Number | E1D267G | 2215505 |
| Harness Type | 5-Point | 5-Point |
| Manufacturer | Britax USA | Newell Brands |
| Model Number | E1D267G | 2215505 |
| Material Type | Steel, Plastic, & Polyester | Polyester |

Best for safety conscious parents who want a single high quality seat to last from birth to middle school

Best for parents prioritizing extended rear-facing safety for taller children.

Best for carpooling and multi-vehicle families needing a portable, safe booster.