Chicco KeyFit 35 vs Nuna PIPA RX

Both are infant car seats — here are their published manufacturer specs side by side.

This compares published manufacturer specs — not safety or fit advice. The seat's manual, your vehicle's manual, NHTSA's tools and a certified CPST are the fit-and-safety authority; always check them before installing.

Spec	Chicco KeyFit 35	Nuna PIPA RX
Stage	Infant	Infant
Narrow (3-across)	✓	–
Extended rear-facing	–	–
FAA-approved	✓	✓
Lightweight / travel	✓	✓

How they differ

• the Chicco KeyFit 35 is listed narrow (roughly ≤17″) for fitting three across a back seat; the Nuna PIPA RX isn't listed narrow

Where to buy

Check the Chicco KeyFit 35 price on Amazon →

Check the Nuna PIPA RX price on Amazon →

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FAQ

What's the difference between the Chicco KeyFit 35 and the Nuna PIPA RX?
The Chicco KeyFit 35 is narrow for 3-across, FAA-approved for aircraft, lightweight/travel; the Nuna PIPA RX is FAA-approved for aircraft, lightweight/travel. Both are infant car seats.

Which fits three across, the Chicco KeyFit 35 or the Nuna PIPA RX?
The Chicco KeyFit 35 is listed narrow (~≤17″) for 3-across; the Nuna PIPA RX isn't. Three-across fit still depends on your exact vehicle — confirm before buying.

Which is right for my car and child, the Chicco KeyFit 35 or the Nuna PIPA RX?
That depends on your specific vehicle and child — this page compares published manufacturer specs only, not fit or safety. Check the seat manual, your vehicle manual, NHTSA's car-seat finder and ideally a certified CPST before deciding.

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