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Britax Romer Kidfix III S Storm Grey

Britax Romer Kidfix III S Storm Grey

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Britax Romer Kidfix III S Storm Grey Britax Romer Kidfix III S Storm Grey Britax Romer Kidfix III S Storm Grey Britax Romer Kidfix III S Storm Grey

Britax Romer Kidfix III S Storm Grey

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Storm Grey
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item features:
  • Suitable from 3.5 to 12 years of age
  • Protects from head to hip
  • Durable, easy-care materials
  • Shock-absorbing foam pad
  • Large, ergonomic seating area
Full product information >

Introducing the latest addition to the Kidfix family; the Kidfix III S! Suitable from roughly 3.5 to 12 years of age (or 15-36 kgs), the Kidfix III S is packed full of safety features to keep your little one protected on the road, all wrapped up in a comfy, ergonomic seat. 


The Kidfix III S comes with many of the same features as previous Kidfix and Britax models, however the latest reboot also features a new XP Pad, which is essentially a shock-absorbing foam pad positioned around the seat belt where it sits across your child's chest. The main reason for this new design is that the XP Pad can absorb up to a whopping 30% of impact force in the event of a front-on collision! Given the Kidfix III S is designed to be used forward-facing, this is a really handy feature when it comes to protecting your child. What's more, the XP Pad can also help to prevent your child's chin from hitting their chest during this type of accident, can prevent their head from jerking forwards, and pads the seat belt so that there's less risk of it cutting into your little one if you have to brake suddenly. That's a lot of extra safety from one small feature! 


As with most Britax seats, the Kidfix III S is of course fitted with the super-safe SICT (Side Impact Cushioning Technology) system. This works by minimising the gap between your child's seat and the door closest to them, effectively putting itself in between your child and any side-impact force that would occur in a side-on collision, absorbing that force away from your little passenger before it reaches them and reducing it down to a safer level. It's super easy to use, simply unscrew it from the side of the headrest nearest to the door and you're good to go! 


Another important safety feature to mention is the SecureGuard technology, which holds the seat belt in the optimum position to reduce the chance of injury to your little one's abdomen during an accident. The SecureGuard works by creating an additional 4th point of contact instead of the standard 3 created by the 3-point seat belt, which helps to disperse the force exerted on your child in a head-on collision, and is even proven to reduce abdominal forces by up to 35%! The Kidfix III S highback booster also offers head to hip protection, which is particularly useful in side-on collisions, and features an extra padded headrest for superior neck and head protection. 


In terms of comfort, the Britax Kidfix III S is one of the most comfortable on the market, with an ergonomic shape and design that supports your child completely as they grow. To start with, the seating area is approximately 20% larger than similar models, while an improved shape and extra padding make it super comfy for children of all ages and sizes - perfect for growing kids! The adjustable V-shaped backrest leaves plenty of room for your child's shoulders and back as they develop, and sits flush against your vehicle's seat for a more natural and comfortable fit. 


The headrest can also be adjusted easily with one hand to suit your growing child, and features an ergonomic design that helps support their head if they have a tendency to fall asleep in the car. This can prevent their head from flopping forward and out of the 'safety zone'. Remember to always position your little one's headrest just above their shoulders to ensure they're properly protected and supported. 


When it comes to installing your Britax Romer Kidfix III S you have two options:

  • Using the ISOFIX connectors and your vehicle's 3-point seat belt
  • Using the 3-point seat belt only

If your vehicle is equipped with ISOFIX anchorage points we would recommend making use of these. If you're unsure whether your car features ISOFIX, you can find out here


Finally, to help you keep your Kidfix III S clean over the years, the covers can be quickly and easily removed and popped into your washing machine for an instant refresh. 


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  • Suitable from 3.5 to 12 years of age
  • Protects from head to hip
  • Durable, easy-care materials
  • Shock-absorbing foam pad
  • Large, ergonomic seating area
  • SecureGuard helps protect your child's abdominal area
  • Advanced Side Impact Cushioning Technology (SICT)
  • Adjustable headrest and backrest
  • Belted or ISOFIX installation
  • Removable, machine washable cover

Dimensions (H x W x D): 85 x 54 x 43 cm


Weight: 8 kg

Suitability: 3.5 to 12 years (15 - 36 kgs)


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We aim to dispatch all 'available for immediate dispatch' orders placed by 12pm the same working day.  Exceptions include made to order items for example some nursery furniture or direct ship items sent by the manufacturer directly to the customer.  In these cases an approximate delivery schedule is shown next to the product.


Our standard delivery cost is £4.99 for orders under £49.99.  Orders over £49.99 is free of charge.  Exceptions apply please view our Delivery & Dispatch page for details.
Any items 'available for immediate dispatch' will have the choice of standard delivery (2-3 working days) or express delivery (1-2 working days) this can be selected during the checkout process.
Orders for delivery to Scottish Highlands, UK Islands & Northern Ireland charged seperately. These schedules would exclude made to order and direct ship items.  For more information please click here


We offer a 14 day return policy allowing you to decide if the goods are as expected.  During this time you may return the goods at your expense or request collection with our courier company at a cost of £18 per parcel.  If the item has been used you will be unable to return the item under distance selling regulations.
Any damage in transit of shortages must be reported with 48 hours of receipt of the goods after this time claims will not be accepted.
Nursery furniture may incur additional charges for return.  Assembling furniture constitutes acceptance of the goods.  

For more detailed information please read our terms and conditions.

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Britax Romer Kidfix III S Storm Grey
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