What does extended rear-facing mean and why is it important?
In a collision, a child’s head can be thrown forward with great force in a forward-facing car seat because the body is held in place by the harness but the head and neck are not. An infant’s neck muscles are weak and their head is disproportionately big compared to their body, so this can cause serious injury.
In an extended rear-facing seat, the force pushes the child into the seat, so the head, neck, and spine are protected, which reduces the risk of injury.
While they can be more expensive, keeping your child in a rear-facing position as long as you can will generally be safer for them, especially if you know you'll be driving a lot. It also depends on the size of your vehicle and how the seat is fitted.
“Some parents like to keep their child rear-facing well past the 15-month minimum, and extended rear-facing seats are perfect for this,” explains Carroll. “These seats are designed to accommodate children up to around 125 cm or seven years old, giving extra time in the safest position. Just make sure your car has enough space for the seat and that it’s installed according to the manufacturer’s instructions.”
What's the difference between R44 and R129 (i-Size)?
At the moment, both R129 and R44 car seats are available to buy and legal to use in the UK, but eventually i-Size will replace all R44 seats.
R44
Classification is based on weight
Side-impact tests aren’t required, although some manufacturer’s do them anyway
Frontal collision testing is done at a speed of 50km/h and rear impact collision testing is done at 30km/h
Seat can be fitted using a seatbelt or ISOFIX fittings
Seat must be rear-facing until the child weighs 9kg (around nine months)
R129
Classification is based on height
Side-impact tests are mandatory
Seat can only be fitted using ISOFIX – ISOFIX reduces the margin for error
Seat must be rear-facing until the child is older than 15 months
Side-impact protection, which usually takes the form of padding around the headrest and sides, absorbs the force of the impact in the event of a car accident to prevent serious head injuries
How we tested the best toddler car seats
How we tested for assembly, safety and stability
We analysed what tests the seats had passed and, crucially, how easy each seat was to attach and detach in addition to how useful and effective the designated fixing systems (seatbelt or ISOFIX) were in order to avoid making any dangerous mistakes. We also switched from rear- to front-facing and reclining positions where possible.
We analysed the materials used, studying everything from padding to the straps, and we thoroughly checked the safety features of each, looking for five-point harnesses that couldn’t be clicked open by small fingers.
How we tested for comfort
We made sure that babies were comfortable, that there were no parts that could rub or cause irritation, and that all fittings were baby-proof, with no chance of parts being removed or buckles and belts being undone by the child in the seat or others sitting with them.
We noted if there was anything that was distracting about the seat when driving – did the seat obscure your view? Were the colours too ‘jazzy’ or bright?
How we tested in day-to-day life
We tested how quick and easy it was to get little ones in and out of the seat, if they were able to fall asleep comfortably if they usually did so in a car, if the seat was able to accommodate them when removed from the car if still sleeping, and if they seemed happy in the seat.
We also evaluated if the seat was easily adjustable to grow with your child. We took the seats on busy school runs, shopping trips, longer journeys and quick trips out throughout the day, observing how happy and comfortable babies were and how convenient seats were to get in and out of the car if necessary.
About the author
Tammy Jacks is a seasoned professional with over 15 years of experience in the publishing industry. She has held prominent roles, including Managing Editor and Health & Beauty Editor at Woman & Home magazine in South Africa, and Assistant Editor at the parenting magazine Living and Loving. In addition, she has contributed to a variety of lifestyle publications such as Oprah Mag SA, Health Intelligence, Your Family Magazine, and Longevity. She has also worked on editing projects for fitness influencers, health professionals, and Clicks Clubcard Magazine.
Tammy is a distinguished researcher and writer in the field of child safety, with a notable focus on the critical domain of car seats. Her extensive expertise and commitment to child safety have made her a trusted authority in providing comprehensive insights and guidance to parents and caregivers looking for the right car seat for their children. As a mum to an eight-year-old, Tammy has personally tried and tested numerous car seats over the years, across all age categories.
About the editor
Laura Westerman is an editor, writer and Deputy Head of Editorial Content at Mumsnet. With over seven years' experience as a full-time editor, five of which have been spent writing, commissioning and editing product reviews and round-ups, Laura has a keen eye for what parents love and likes nothing more than putting together honest reviews to make parents' lives that little bit easier.
In addition to her work as a writer and editor, she has also appeared in a number of baby product review videos for Mumsnet's YouTube channel. She is mum to a one-year-old.
About the expert
Kirsty Carroll is the Showroom Manager at Kiddies Kingdom and has been guiding parents through the often overwhelming world of baby products for over a decade. As Showroom Manager she takes pride in helping parents feel confident in their choices, ensuring they find products that are safe, practical, and right for their families.
Starting her career at Mothercare as a Home and Travel Advisor, Kirsty quickly specialised in car seat safety, earning an IOSH accreditation in 2017 and becoming a regional car seat trainer.
She believes every family is unique and takes the time to understand their lifestyle, needs, and priorities to recommend the best products. For Kirsty, the best part of the job is being part of such a special journey and helping new families prepare for life with their little ones.
Why you should trust our reviews
Mumsnet product reviews are written by real parents after weeks of research and testing. We work hard to provide honest and independent advice you can trust – brands can’t pay to be featured in our articles.
We spend hours researching, speaking to parents, analysing data and listening to experts before we test out the products on our shortlist.
Transparency is really important to us and that's why we're always upfront about how we tested the products we recommend. We won't always recommend the cheapest products or the ones with the most features. We write about products that we feel offer the best value to most parents – the ones we'd recommend to our own friends and family.