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Key takeaways
- Both brands sell infant seats that meet the same federal standard, FMVSS 213, so the choice is carrying and travel habits, not a safety ranking.
- All three seats take 4 to 30 pounds. The Doona allows up to 32 inches and the PIPA seats 30, so a tall baby may outgrow a PIPA first.
- The PIPA aire rx carrier is 6.2 pounds and the PIPA rx is 7.6, both without canopy and inserts. The Doona is 17.2 pounds with its wheels built in.
- Doona gives its seat 6 years from manufacture. Nuna's PIPA rx manual points you to the label on the carrier or base instead of a number.
- Recalls we found by October 16, 2026: none naming the PIPA or the Doona. Nuna's one NHTSA recall (24C-002) covers the RAVA convertible seat.
At a glance
Nuna PIPA rx
Suits: Parents who want a light carrier on a base with a stability leg, and who plan to use a Nuna or adapter-equipped stroller.
- Strength: 7.6-lb carrier without canopy and inserts
- Strength: Steel stability leg and anti-rebound panel
- Strength: Installs with the seat belt and no base
- Strength: FAA certified for aircraft use
- Trade-off: 30-inch height limit
- Trade-off: Nuna's manual gives no lifespan number; check the label
- Trade-off: Clicks into Nuna strollers or approved adapters only
Nuna PIPA aire rx
Suits: Parents who carry the seat a lot and want the lightest carrier in the PIPA line.
- Strength: 6.2-lb carrier without canopy and inserts
- Strength: Rigid LATCH, stability leg and anti-rebound panel
- Strength: Installs with the seat belt and no base
- Strength: FAA certified with or without a base
- Trade-off: 30-inch height limit
- Trade-off: Canopy and inserts add about 2.2 lb
- Trade-off: Needs a Nuna stroller or adapter
Doona Car Seat & Stroller
Suits: Parents who want one product that is a car seat and a stroller, for city life, public transit and travel.
- Strength: Wheels fold out to make a stroller, no separate frame
- Strength: 4 to 30 lb and up to 32 in
- Strength: Handlebar works as an anti-rebound bar
- Strength: TUV and FAA approved for travel; installs without the base
- Trade-off: 17.2 lb with the wheels built in
- Trade-off: 6-year lifespan, and the stroller use ends with the infant seat
- Trade-off: No load leg is listed
Nuna and Doona both make rear-facing infant seats that meet the same federal standard, FMVSS 213, so you aren't picking between a safer and a less safe seat [1]. The AAP says the right seat fits your child and your car, is installed correctly and is used on every ride [2]. What separates a Nuna PIPA from a Doona is how you carry it, move it and travel with it.
This page compares the Nuna PIPA rx, the Nuna PIPA aire rx and the Doona Car Seat & Stroller from the makers' own pages. For other infant seats, see our infant car seat guide.
Nuna vs Doona at a glance
| Nuna PIPA rx | Nuna PIPA aire rx | Doona | |
|---|---|---|---|
| Child weight | 4 to 30 lb [3] | 4 to 30 lb [4] | 4 to 30 lb [6] |
| Child height | 16 to 30 in [3] | 16 to 30 in [4] | Up to 32 in [6] |
| Carrier weight | 7.6 lb without canopy and inserts [3] | 6.2 lb without canopy and inserts [4] | 17.2 lb with wheels (base 10.4 lb) [6] |
| Base install | RELX base, LATCH or seat belt [3] | Base with rigid LATCH or seat belt [4] | LATCH base [6] |
| Baseless install | Yes, seat belt [3] | Yes, seat belt [4] | Yes [6] |
| Anti-rebound or load leg | Stability leg, anti-rebound panel [3] | Stability leg, anti-rebound panel [4] | Handlebar acts as anti-rebound bar [6] |
| Lifespan | Check the label [5] | Check the label [5] | 6 years [7] |
| Air travel | FAA certified [3] | FAA certified, with or without base [4] | TUV and FAA approved [6] |
The specs side by side
Each value links to the maker's page.
| Model | Child weight | Child height | Carrier weight | Installs | Rebound or load leg | Where to buy |
|---|---|---|---|---|---|---|
| Nuna PIPA rxRear-facing infant seat with RELX base and stability leg | 4 to 30 lb | 16 to 30 in | 7.6 lb without canopy and inserts (about 1 lb more with them) | RELX base with LATCH or seat belt; seat belt without base | Steel stability leg on the base; anti-rebound panel | |
| Nuna PIPA aire rxRear-facing infant seat with stability leg | 4 to 30 lb | 16 to 30 in | 6.2 lb without canopy and inserts (about 2.2 lb more with them) | Base with rigid LATCH or seat belt; seat belt without base | Steel stability leg on the base; anti-rebound panel | |
| Doona Car Seat & StrollerInfant car seat with built-in stroller wheels | 4 to 30 lb | Up to 32 in | 17.2 lb, wheels included (base 10.4 lb) | LATCH base; seat belt without base | Handlebar works as an anti-rebound bar | Check on AmazonAffiliate link |
Carrier weight and what you carry
The Nuna PIPA aire rx carrier weighs 6.2 pounds, and Nuna says the canopy and inserts add about 2.2 pounds [4]. The PIPA rx weighs 7.6 pounds, with about a pound more for its canopy and inserts [3]. Those are the carrier weights without a baby.
The Doona weighs 17.2 pounds because the wheels, frame and handlebar are part of the seat [6]. You'll rarely lift it by the handle for long, since it rolls. But if you plan to carry the seat into the house or café every time, the PIPA is roughly 10 pounds lighter.
How long each lasts
Weight is the same: 4 to 30 pounds for all three [3][4][6]. Height differs. Nuna lists 16 to 30 inches for the PIPA seats [3][4]. Doona lists up to 32 inches [6]. A baby who grows tall will likely reach the PIPA's height limit first.
Doona says its expiration date is six years after the manufacture date [7]. Nuna's PIPA rx manual sends you to the label on the carrier or base instead of giving a number [5]. Find the date on your seat's label and see our guide to car seat expiration by brand.
When your baby outgrows either, they move to a convertible seat, and the Doona's stroller use ends with the infant seat, so you'll still need a regular stroller. See infant vs convertible seats for what comes next.
Travel and installation
All three install with the vehicle seat belt and no base [3][4][6]. That helps in taxis and rideshares. Nuna says both PIPA seats are FAA certified for aircraft use, and the aire rx with or without the base [3][4]. Doona says it's TUV and FAA approved for travel [6].
Where they differ is the crash features. The PIPA seats have a steel stability leg on the base and an anti-rebound panel [3][4]. The Doona's handlebar works as an anti-rebound bar in the car, and Doona doesn't list a load leg [6]. The Doona's built-in wheels do the work of a stroller on a plane or a train platform. The PIPA needs a Nuna stroller or an adapter [5]. For stroller pairings, see our travel system guide.
Recalls we found
We searched NHTSA records on October 16, 2026. Recalls can be added at any time, so look up your seat's model number and manufacture date in NHTSA's recall search [9].
- Nuna: NHTSA lists one Nuna recall, campaign 24C-002, covering RAVA convertible seats made from July 2016 through October 2023, where debris near the harness adjuster could stop the harness from staying tight [8]. We found no recall naming the PIPA rx or the PIPA aire rx.
- Doona: We found no NHTSA recall naming the Doona car seat and stroller.
Who each seat fits
Pick by how you live with the seat, not by the badge on it.
- PIPA aire rx: A parent who carries the seat often and wants the lightest carrier of the three.
- PIPA rx: A parent who wants a stability leg and a light carrier and who is buying or already owns a Nuna stroller.
- Doona: A city parent who relies on cabs, transit or flights, wants the seat and stroller in one piece, and is fine with a heavier seat.
You can check the Doona on Amazon: Check price on Amazon Affiliate link. Nuna sells the PIPA seats on its own site and through baby retailers.
For brand-by-brand specs, lifespans and recall history, see our guides to Nuna car seats and the Doona car seat.
Questions people ask
Is the Doona or the Nuna PIPA safer?
Neither. Both are sold in the US as seats that meet FMVSS 213, the same federal standard. The AAP says the right seat fits your child and your car, is installed correctly and is used on every ride. Features such as a stability leg or built-in wheels are about convenience and installation, not a safety ranking.
What is the Doona weight limit?
Doona lists 4 to 30 pounds and up to 32 inches. Once your child reaches either limit, they're done with the Doona and need a convertible car seat and a regular stroller.
What is the Nuna PIPA weight limit?
Nuna lists the PIPA rx and the PIPA aire rx for 4 to 30 pounds and 16 to 30 inches on its US product pages. Some retailers list higher limits for a newer manual, so check the manual that came with your seat.
How long is a Doona good for?
Doona says its expiration date is six years after the date of manufacture, and not to use it past that date. The date is on a label on the seat.
Can the Nuna PIPA be installed without the base?
Yes. Nuna says the PIPA rx and the PIPA aire rx can be installed with the vehicle seat belt and no base, which helps in taxis and rideshares, and that both are FAA certified for aircraft use with or without the base.
Does a Doona or PIPA work with any stroller?
The Doona has its own wheels, so it doesn't need a stroller. The PIPA seats click into Nuna strollers, and into other strollers through adapters. Check the stroller maker's compatibility list before you buy.
Sources
Numbers in brackets in the guide link to these sources.
- 1.49 CFR 571.213, Standard No. 213: Child restraint systemsElectronic Code of Federal Regulations (NHTSA), 2026
- 2.Car Seats: Information for FamiliesAmerican Academy of Pediatrics (HealthyChildren.org), 2026
- 3.PIPA rx Infant Car Seat with RELX BaseNuna, 2026
- 4.PIPA aire rx Infant Car SeatNuna, 2026
- 5.PIPA rx Infant Car Seat User Manual (US)Nuna, 2026
- 6.Doona + Car Seat & StrollerDoona, 2026
- 7.Myths vs facts: what you need to know about car seat safetyDoona, 2026
- 8.Owner notice: Nuna RAVA convertible car seats, recall 24C-002National Highway Traffic Safety Administration (NHTSA), 2025
- 9.Check for Recalls: Vehicle, Car Seat, Tire, EquipmentNational Highway Traffic Safety Administration (NHTSA), 2026
