If you've been searching for the BeSafe Flex Fit 2 — or perhaps the BeSafe Flex Fix 2, as it's officially spelled — you're in the right place. The spelling trips up a lot of parents (you're certainly not alone), and whatever brought you here, this review will tell you everything you need to know before you decide whether this seat belongs in your family car.

The short version: this is one of the most thoughtfully designed high back booster seats on the market, and it comes from BeSafe — a Norwegian brand with a well-earned reputation for going above and beyond minimum safety standards. Let's get into the detail.

What Is the BeSafe Flex Fix 2?

The BeSafe Flex Fix 2 is the upgraded version of BeSafe's award-winning high back booster seat. It's designed for older children who have outgrown their rear-facing car seat and are ready to move into a forward-facing booster with a belt.

It uses an innovative modular protection system that BeSafe describe as delivering maximum safety — and that's not just marketing language. The seat is built around the idea that protection can be layered and adapted, rather than locked into one fixed configuration.

A note on safety standards: For specific regulatory approvals and certifications for the BeSafe Flex Fix 2, we'd recommend verifying the current details directly with BeSafe or your retailer, as specs can vary by market and production run. If you're comparing seat standards more broadly, it's worth checking resources such as GOV.UK or Which? for up-to-date guidance on what different approval standards mean for your child's safety.

For families who've kept their child rear-facing for as long as possible — which we wholeheartedly support at Saunders & Smalls — the Flex Fix 2 is the kind of seat you want waiting at the other end. It doesn't let safety standards slip just because your child has moved to a new stage. If you're not quite there yet, our BeSafe Beyond review is well worth a read for an extended rear-facing option that's hard to beat.

Key Features Worth Knowing About

There's a lot packed into this seat. Here's what stands out:

Modular protection system — the headline feature. BeSafe's approach here allows the seat's protection to be configured for different children and situations, rather than offering a one-size solution.
High back booster design — provides head, neck, and upper body protection that a backless booster simply cannot match. If you're choosing between a backless and a high back booster, the high back version wins on safety every time.
Current certification — for the latest information on which safety standards and approvals apply to this seat, check directly with BeSafe or your retailer before purchasing.
Belt-positioning guide — helps ensure the adult seatbelt routes correctly across your child's body, which is one of the most critical factors in how well a booster seat performs in a crash.
Adjustable headrest — grows with your child, extending the usable life of the seat.
Multiple recline positions — important for longer journeys and child comfort, which in turn means fewer distractions for the driver.
Available in a range of colours and fabrics — including the popular Dark Sand Soft Breeze finish.

Safety tip: A booster seat is only as safe as the seatbelt routing it creates. If the belt sits across your child's neck or too low across the stomach, the seat isn't doing its job — regardless of how good the seat is. A proper fitting check makes all the difference here.

Is It Compatible With My Car?

This is always the question, and it's the right one to ask. The honest answer is: the BeSafe Flex Fix 2 is compatible with the vast majority of UK family cars, but compatibility depends on the specific vehicle, and it's always worth checking before you buy.

A few things to consider:

ISOFIX or belt installation? Check what your car offers and what the seat supports. Some high back boosters are belt-only; others use ISOFIX or a combination. Refer to BeSafe's vehicle compatibility list for up-to-date guidance on your specific make and model.
Middle seat use — if you're hoping to use this seat in the centre position, check compatibility carefully. Centre seats vary enormously between cars. Our guide to rear car seat placement covers the key considerations in more detail.
Seat squab depth — some car seats don't suit shallower seat bases. If your car has a particularly shallow rear bench, it's worth flagging when you book a fitting.

If you're based in Somerset and would like a proper fitting check, you can book a Smalls Install Plus appointment with us. We'll make sure the seat is correctly installed and the belt is routed exactly as it should be. If you're further afield, get in touch and we'll do our best to point you in the right direction.

How Does It Compare to the Competition?

The high back booster market has improved a lot in recent years, but there's still a significant gap between the best seats and the average ones. The BeSafe Flex Fit 2 (or Flex Fix 2, to use the correct spelling) sits firmly in the upper tier.

A few reasons it stands out:

BeSafe's safety pedigree — the brand consistently invests in safety research beyond what regulations require. Their seats frequently perform well in independent tests, and they're not shy about pushing the industry forward.
Build quality — the materials and construction feel robust and considered. This isn't a seat that feels like it was designed to a price point.
Longevity — the adjustable headrest and modular design mean the seat should see your child through several years of use, rather than needing replacing after a single growth spurt.

We stock a range of BeSafe seats at Saunders & Smalls, and the Flex Fix 2 is one we're genuinely enthusiastic about recommending — not because we have to, but because it earns it.

For families exploring the full range of high back booster seats, we'd suggest comparing it with a small shortlist before committing. If you'd like to see how another strong competitor shapes up, our Britax Max Safe Pro review makes for useful reading alongside this one.

Who Is This Seat For?

The BeSafe Flex Fix 2 is a strong choice if:

Your child has recently outgrown their rear-facing car seat and you want to maintain the same level of safety commitment in the next stage
You want a seat that meets current safety standards — confirm the specific approvals with BeSafe or your retailer before buying
You value build quality and expect the seat to last
You want reassurance that the belt is being guided correctly across your child's body, not just resting wherever it lands

It may not be the right seat if you're purely budget-driven — BeSafe seats sit in the premium bracket, and this one is no exception. But for parents who've invested in extended rear-facing and want to carry that safety-first approach into the booster phase, it's a very natural next step.

Our Verdict

The BeSafe Flex Fix 2 is exactly what we'd expect from BeSafe: well-engineered, thoughtfully designed, and built to do more than just pass a test. If you're transitioning out of rear-facing and want a high back booster that takes the job seriously, this seat deserves a close look.

Whether you searched for the BeSafe Flex Fit 2 or the BeSafe Flex Fix 2, you've landed in the right place — and we're here to help you make the right call for your child.

Ready to buy or want to talk it through first?

Not in Somerset? Get in touch and we'll help you find the right support wherever you are.

BeSafe Flex Fit 2 Review: The High Back Booster That Takes Safety Seriously