Baby Trend Trooper Slim Review: A Narrow 3-in-1 Car Seat That Can Fly

The Baby Trend Trooper Slim is a budget 3-in-1 convertible car seat that also works on a plane. Baby Trend gives its widest point as 17.75 inches, and it weighs about 12 lb. Baby Trend lists three harnessed modes: rear-facing from 4 to 18 lb and from 18 to 40 lb, and forward-facing from 30 to 65 lb, up to 50 inches tall. Its current page lists no booster mode. If you want one inexpensive seat that can fly with you, ride in the rental car, and keep fitting your child for years, it is a strong choice. If you fly every month with a forward-facing child, a dedicated travel seat is lighter to carry.

Baby Trend Trooper Slim 3-in-1 Convertible Car Seat

Best Budget Pick

Baby Trend

Compare

Budget-priced, FAA approved, and 17.75 inches at its widest — a convertible with three harnessed modes, rear-facing to 40 lb and forward-facing to 65 lb.

weight:~12 lb

age Range:Rear-facing 4–18 and 18–40 lb · forward-facing harness 30–65 lb · max height 50 in

width:17.75 in at its widest, per Baby Trend

safety:FAA approved, side impact protection

Pros

• ✓FAA approved for air travel
• ✓17.75 in at its widest, narrower than many convertible seats
• ✓Three harnessed modes: rear-facing 4–18 and 18–40 lb, forward-facing 30–65 lb
• ✓Lightweight at roughly 12 lb, at a budget price

Cons

• ×Heavier than dedicated travel seats like the WAYB Pico
• ×Basic padding and comfort features
• ×No booster mode on Baby Trend's current page — check the manual for your version
• ×No premium recline adjustment

Check Price on Amazon (opens in new tab)

This product is featured in our Best FAA-Approved Car Seats roundup.

Quick verdict

Buy the Trooper Slim if you want a single seat for home and travel, need it narrow (for airplane rows or three across in a back seat), and want to keep the cost low so gate-check damage is not a disaster. Its trade-offs come with the price: padding is basic, harness adjustment is manual, and Baby Trend's current page lists no booster mode, so plan on a separate booster later. At 12 lb it is light for a convertible but heavier than an 8 lb travel seat like the WAYB Pico.

How we assessed this

We have not tested this seat. This page is built from Baby Trend's published specification, FAA and NHTSA guidance on child restraints, and comparison with other travel car seats. Full methodology: How We Research.

Is the Trooper Slim FAA-approved?

Yes, in its harnessed modes (rear-facing and forward-facing). Baby Trend lists the seat as FAA approved, and the product listing places the certification label on the shell near the recline foot. The FAA's Flying with Children page says the label must read "This restraint is certified for use in motor vehicles and aircraft". Find it before you travel and keep it legible. Without it, crew can ask you to check the seat.

Booster seats cannot be used on a plane. The FAA prohibits booster seats and backless restraints during taxi, takeoff and landing. Baby Trend's current page lists no booster mode for the Trooper Slim; if the manual for your version describes one, treat it as car-only.

Will it fit in an airplane seat?

Often, but measure. Baby Trend gives its widest point as 17.75 inches (some retail listings say about 16.75 in; plan around the larger number). That is narrower than many everyday convertibles, but economy seat widths commonly sit around 17 to 18 inches between the armrests, so it can be a tight fit. Seat widths vary by aircraft and cabin, though, so no car seat is guaranteed to fit every seat. If your purchased seat cannot take an approved car seat, the FAA says the airline must accommodate it in another seat in the same class of service. Lifting the armrest before you install also helps.

How do you install it on a plane?

Planes have lap belts and no LATCH anchors, so you always use the belt path.

Rear-facing (to 40 lb):

1. Place the seat facing the rear of the plane and set the recline per the manual.
2. Pull the lap belt out fully and route it through the rear-facing belt path.
3. Buckle, then press the seat down into the cushion while you pull the belt tight. At the belt path, the seat should move less than an inch side to side.

Forward-facing (30–65 lb):

1. Route the lap belt through the forward-facing belt path.
2. Buckle and tighten while pressing down, then run the same one-inch check.

Rear-facing seats can make it hard for the passenger in front to recline. Board early if your airline offers family boarding so you can install without a queue behind you. Most airlines want car seats in a window seat so they do not block an exit path. Check your carrier's policy.

What are the age and weight limits?

Baby Trend's current page lists no booster mode; check the manual for your version. Each mode also has height limits, which are listed in the manual. AAP guidance is to keep children rear-facing until they reach the seat's rear-facing limit, which here is 40 lb. That is a useful long rear-facing range for the price.

Rental cars and the destination

The seat installs with LATCH or a vehicle seat belt. Baby Trend lists a LATCH limit of 55 lb; above that, use the vehicle belt. In a rental car, also check the anchor limit in the vehicle manual, and use the top tether when forward-facing. NHTSA's car seat page covers the federal standard, recall registration and how to find a free inspection station near your destination.

If you are not using the seat on the plane (for example, a lap infant under 2), gate-checking is usually free. A padded bag such as the J.L. Childress car seat travel bag protects the shell. Inspect the seat for cracks before every use after it has been checked.

How it compares

• vs WAYB Pico: The Pico is lighter and folds flat, but it is forward-facing only (26.5–50 lb) and sits in the premium price tier. It suits families who fly constantly with an older toddler.
• vs CARES harness: CARES is plane-only. Choose it when a car seat is already waiting at your destination. Choose the Trooper Slim when you need one in the rental car.

Who should skip it

• Monthly flyers with a forward-facing child. The 4 lb weight saving and flat fold of a dedicated travel seat add up.
• Families prioritizing everyday comfort. Padding is basic. Do not add aftermarket cushions, which can affect harness fit.
• Families who want one seat through the booster years. Baby Trend's current page lists no booster mode, so you will need a separate booster later.
• Parents who want one-touch harness adjustment. Adjusting the harness and headrest is manual.

Final verdict

The Trooper Slim is not the lightest travel seat or the plushest everyday seat. It covers more of a child's car-seat years than nearly anything at its price, it is narrow enough for most airplane rows, and it carries the aircraft label for harnessed use. For families who fly a few times a year and do not want to own two car seats, it is the practical pick.