Clek Foonf vs Fllo: Which Convertible Car Seat Is Right for You?

Nearly the same seat, and equally safe: pick the Foonf for rigid-LATCH, the Fllo for a belt install.

The Foonf and the Fllo are Clek's two convertible car seats, and they're closer cousins than the price gap suggests. Both share the same narrow 16.9-inch width, the same 14-to-50-pound rear-facing and up-to-65 forward-facing range, a complete metal substructure, a steel anti-rebound bar, and the same whole-seat flame-retardant-free build. What separates them is how they install and how far they recline, plus a couple of smaller things that follow from the install choice.

*Height spans rear- to forward-facing setups; width and depth are identical on both.

What's actually different between the Foonf and Fllo?

Mostly how they install, and how far they recline. The Foonf installs with Clek's Rigid-LATCH, connectors that click straight onto your car's lower anchors, and it reclines in four positions. The Fllo installs with a standard belt path (the vehicle seat belt or flexible LATCH) and reclines in one. That one install difference ripples out to a couple of others, the crash-crumple system and how high the seat sits, which we get into next. What it doesn't do is make either seat safer.

Is the Foonf or the Fllo safer?

Neither. Both are side-impact tested and carry the same protection: advanced side-impact protection, structural headrests, and a steel anti-rebound bar. What differs is the crumple system, and it's matched to how each seat installs. The Foonf uses REACT (Rigid-LATCH Energy Absorbing Crumple Technology), which lets the frame move against its rigid-LATCH base to absorb crash forces; the Fllo uses EACT, the same energy-absorbing idea tuned for a belt install, moving against the vehicle seat instead. The Foonf's rear-facing base also gives it a higher ride height, while the Fllo sits lower, which can help sightlines and free up room in a compact car.

Forward-facing, the Foonf can be installed in a way most car seats can't. You normally attach a forward-facing seat with either the lower LATCH anchors or the seat belt, plus a top tether, and most seats don't let you use the anchors and belt together. The Foonf does, up to 65 pounds, which keeps its rigid-LATCH connection, and the side-impact protection that comes with it, working through the forward-facing years. The Fllo installs with the seat belt instead and passes the same federal crash-safety tests, so this is a bonus on the Foonf, not a shortfall on the Fllo.

Who should get the Foonf, and who the Fllo?

It comes down to install type and recline. Pick the Foonf if rigid-LATCH suits your car: the connectors click straight onto your lower anchors, and the four recline positions let you dial in the angle for a dozing toddler. This also works best for some of the SUVs that use the TILT feature on the second row seat in order to access the third row. That feature can only be used with a rigid-LATCH connection and not a seat belt.

Pick the Fllo if you'd rather install with the seat belt, or if the spot you're using has no lower anchors, like a center or third seat when you're fitting three across, or the third row in some cars which don’t offer lower anchors. You give up the extra recline and the rigid connectors, and you save $130.

Will the Foonf or Fllo fit three across?

Both are narrow enough for most cars. The Fllo's usually the middle-seat pick. At the same slim 16.9 inches wide, either one leaves room for a third seat on a crowded bench; width isn't the tiebreaker between them. The install is. The Foonf needs rigid-LATCH, so it has to go where there are lower anchors, and many vehicles don't put them in the center seat (your car's manual will say). The Fllo installs with the seat belt, which every seating position has, so it's the one that goes in a center or third seat with no lower anchors. In a tight back seat, that usually means the Fllo in the middle, with the Foonfs, or whatever else you're running, on either side.

Are Clek car seats really flame-retardant free?

Yes, and not just the cover. Clek builds both the Foonf and the Fllo free of flame retardants across the fabric, the foam laminated behind it, and the other major components, while still meeting the federal fire-safety standard every car seat has to pass. They're PFAS-free, too. That whole-seat standard, foam included and not just the part you can see, is exactly what earns a seat a spot in our flame-retardant-free collection, and it's the same reason we dug into what fire retardants are and why they're worth avoiding.

What is Clek’s Mammoth Fabric?

It's Clek's wool option, for so no plastic touches baby. The standard Foonf and Fllo come in polyester, which is technically a plastic. Both are offered in Clek's Mammoth fabric option, a merino wool and TENCEL blend, for a bit more money. This upgrade is worth separating from the flame-retardant question, because "clean" and "natural" aren't the same promise: flame-retardant-free means the worst chemicals are left out, but the fabric itself can still be synthetic. If you'd rather not have plastic against your baby at all, Mammoth is the pick. See the Foonf in Mammoth or the Fllo in Mammoth.

Which Clek convertible should you buy?

Fllo for belt installs; Foonf for rigid-LATCH and more recline. Both give you the same limits, the same side-impact protection, the same FAA approval for flying, and the same nine-year lifespan. Both rear-face to 50 pounds, enough to keep your child rear-facing for years, right up to the seat's limit, the way we'd want. Clek also makes the Liing infant seat for the newborn stage and the Oobr booster for the years after. See the whole range in our Clek collection, or browse every convertible car seat we carry.