Clek Fllo review

The Fllo exists to solve one problem: a back seat that is not wide enough for the seat you actually want. Clek publishes 16.9 in of seating width and a 13 in base, which is narrower than almost anything that still rear-faces to 50 lb, and it comes with a steel anti-rebound bar in the box rather than as an upcharge. If three seats have to go across a bench, or if your car's middle position is barely a position at all, that combination is the reason this seat is on your list.

The catch is near the bottom of the specification sheet. Clek rates the Fllo rear-facing from 14 lb and 25 in, and requires that the child can sit upright unaided. A newborn meets none of those three conditions. The Fllo is not a first seat out of the box — it is the seat you move into at roughly four to six months, usually after an infant carrier. Clek does sell an insert that changes this, and we cover it below, because it is the single most consequential thing to know before you buy.

Everything else is what you would expect at this price: a long rear-facing range in a narrow body, flame-retardant-free fabric across the range, a nine-year lifespan, and a seat heavy enough at 25 lb that you will not be moving it between cars casually. We read all of that from Clek's own product page on 5 November 2026 and it is cited row by row in the table below.

We have not crash-tested this product and we do not own one. What we did is read the manufacturer's own specification page and manual, record every figure against the page it came from, check the model against NHTSA's recall database, and confirm it is currently sold — all on the date shown in the table below. Then we assessed it against the five criteria we apply to every product on this site.

For the Fllo specifically, the figures that matter are dimensional and they are the ones manufacturers are least consistent about publishing, so we recorded three separately: seating width, base width and seat weight both with and without the anti-rebound bar. We also read Clek's separate insert product page rather than assuming what the accessory does to the seat's lower limit, and we looked up the 2021 Foonf and Fllo recall in NHTSA's own Part 573 report so we could state its scope by manufacture date rather than by brand.

We do not print a NHTSA star rating or an IIHS category for this model. NHTSA publishes an Ease-of-Use rating and IIHS publishes booster belt-fit ratings, but both block automated access to their databases, so we could not read a figure from the primary source. Reprinting an unverified safety number on a page a parent may rely on is not a risk worth taking, so we link the official lookup tool instead. The full method is on the methodology page.

Most convertible car seats start at 4 or 5 lb, so a 14 lb floor is unusual enough that people miss it. Clek's published rear-facing range for the Fllo is 14-50 lb and 25-43 in, with the additional requirement that the child can sit upright on their own. Those are three separate gates, and a typical newborn clears none of them: average birth weight is well under 14 lb, newborn length is under 25 in, and sitting upright unaided arrives somewhere around six months.

Clek's own answer to this is a two-piece plush insert, sold separately, which its product page says extends use of the Foonf or Fllo from birth — it lists the insert itself for 5-22 lb and 19-33 in and recommends it for infants up to about six months. The page also states it fits the Foonf and Fllo only, and is not compatible with Clek's Liing or Liingo infant carriers. On the day we checked it was in stock, priced in the high-double-digit bracket — real money on top of a seat already in the premium tier. Check the current figure on both before you commit, because the pair is the purchase, not the seat alone.

For the wider decision about which of these two routes is the better value, we set out the arithmetic in infant car seat vs convertible. The short version is that a carrier buys you a sleeping transfer and about a year of use, and a convertible from birth saves a purchase — but the Fllo is one of the few seats where that second path carries an extra accessory cost.

Width is the most under-discussed specification in car seats and the most common reason a seat gets returned. Two things make the Fllo's 16.9 in figure useful rather than just a number on a page.

• The base is narrower than the shell. Clek publishes 13 in at the base against 16.9 in of seating width, which means the part that competes with a neighboring seat's buckle and belt path is the narrow part. Seats whose widest point is at the bottom cause problems that their headline width does not predict.
• It still rear-faces to 50 lb. Narrow seats usually buy their width by shortening the rear-facing range. The Fllo does not: 50 lb rear-facing is the figure the extended-rear-facing seats advertise, in a shell narrower than most of them.
• It takes a seat belt install as readily as LATCH. Clek lists flexible LATCH or seat belt for both directions. In a three-across attempt that matters, because the center position frequently has no lower anchors and the outboard anchors may be unusable once two seats are in.

What the width does not do is guarantee three across. That depends on your bench, your other two seats and your vehicle's buckle geometry, and no published figure settles it — we walk through how to measure it in how many car seats fit in my car. The Fllo belongs on the shortlist for that attempt, alongside the other genuinely narrow options in best car seats for small cars.

One honest cost of a narrow shell: it is narrow for the child too. A broad five- or six-year-old in a winter layer will find the Fllo snug, which is a reasonable trade when the alternative is a seat that does not fit the car at all, and a poor one if the car was never the constraint.

Clek includes a steel anti-rebound bar in the box. A rear-facing seat rotates back toward the vehicle seat after the initial crash pulse, and the bar limits that travel by bracing against the vehicle seat back. It is a genuine piece of engineering rather than a marketing feature, and it is one of the few things on a car seat that is strictly additive — it does not trade against anything except 3 lb of weight, which is why Clek publishes 25 lb for the seat and 28 lb with the bar fitted rear-facing.

The feature the Fllo does not have is rigid LATCH. That is a Foonf feature, and it is the clearest line between the two seats in Clek's own range: the Foonf installs with rigid connectors that pull the seat onto the anchors mechanically, while the Fllo uses conventional flexible LATCH straps or the vehicle belt. Plenty of coverage conflates the two seats. If rigid LATCH is the reason you are looking at Clek, the Fllo is the wrong model.

Nine years is shorter than the ten that several mainstream seats publish, and it is worth knowing if you are buying with a second child in mind. The expiry date is on the seat, and do car seats expire explains why the date is not arbitrary.

Clek recalled the Foonf and Fllo in 2021 under NHTSA campaign 21C005. The scope was seats manufactured before 21 May 2021, the defect was loose foam pieces that posed a choking risk to a child, and the remedy was a free plastic insert kit mailed to owners. NHTSA's Part 573 report puts the potential population at just over 150,000 units.

For a new seat bought today this is history. For a secondhand Fllo it is the first thing to check, and it is checkable: recalls are scoped by model number and manufacture date, both printed on the seat, not by brand or by model name. Ask the seller whether the remedy kit was fitted, and if the answer is vague, treat the seat as unremedied — the kit is free from Clek either way. Our guide to how to check a car seat recall covers the lookup, and secondhand car seat safety covers the rest of what to ask before you buy a used seat at any price.

We found no recall covering Fllo units manufactured after that cutoff when we checked on 5 November 2026. Recall status changes, so check your own model number against NHTSA's database rather than relying on any article, including this one.

• Anyone attempting three car seats across a bench. This is the seat's reason to exist, and the 13 in base is as important as the 16.9 in shell.
• Small-car owners who still want a 50 lb rear-facing limit. Most narrow seats make you give that up. This one does not.
• Families moving out of an infant carrier at four to six months. By then the 14 lb and 25 in gates are irrelevant and you get the width and the anti-rebound bar with no accessory cost.
• Buyers who care about fabric chemistry. Clek publishes flame-retardant-free and PFAS-free across the range rather than restricting it to one premium trim.

Who should not: anyone buying one seat to use from birth without also budgeting for the insert; anyone who wants rigid LATCH, which is the Foonf; anyone with a broad older child, who will be happier in a wider shell; and anyone whose back seat was never the constraint, in which case you are paying a premium for a dimension you do not need — are expensive car seats worth it sets out where that money does and does not buy protection.