Britax Romer DUALFIX 5Z i-SIZE Car Seat Group 0+/1-Night Blue
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Britax Romer DUALFIX 5Z i-SIZE Car...
Britax Romer DUALFIX 5Z i-SIZE Car Seat Group 0+/1-Night Blue

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Britax Romer DUALFIX 5Z i-SIZE Car Seat Group 0+/1-Night Blue

2-3 Days Delivery 2024-02-29
£239.00 £249.00 -£10.00
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The DUALFIX 5Z is an innovative 2nd stage car seat within the Britax Römer 5Z family, which offers ultimate safety and comfort for children from 61 - 105 cm. This seat is intended to use on FLEX BASE 5Z with 360° rotation (available separately).

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Established 40+ years
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Britax Romer DUALFIX 5Z i-SIZE Car Seat Group 0+/1-Night Blue

Ready for the next step on your little one's journey? The DUALFIX 5Z is our perfect follow-up seat to use after the BABY-SAFE 5Z2 or any other infant carrier. Easily clicked onto the FLEX BASE 5Z, it provides superior protection and cosy comfort for many journeys to come, until your child is four years old. Thanks to the 360° rotation of the FLEX BASE 5Z, the seat can be used rearward and forward facing, making it easy to get them in and out of the car, even in the tightest of parking spots. Children grow fast - but even if they've outgrown their clothes, they'll still fit their car seat. When you move on from an infant carrier, the DUALFIX 5Z keeps your little one protected and comfortable in the car from 3 months to 4 years. The seat has 12 recline positions and a V-shaped headrest that provides support and space as your child grows, so they can take a nap or explore the world with their eyes. Plus, it can be rotated effortlessly from any position without needing to disturb your little one. Make safety your top priority with the DUALFIX 5Z car seat. Built to more demanding specifications than the current industry standard (UN R129), your child is protected on every journey, even if the unthinkable happens. The DUALFIX 5Z includes optimised side-impact protection system to provide superior safety in a side collision. Plus it has an innovative support leg and solid rebound bar to protect your child from any impact. You'll have peace of mind wherever your adventures take you. Put your child's safety in the best hands. From initial idea to finished product, our whole development process is under one roof, so you're investing in the highest quality and low transport emissions. With state-of-the-art testing that's more rigorous than the legal standards, you can rely on the DUALFIX 5Z to ensure your child's safety.


  • Suitable from 61 -105 cm and up to 18 kg (approx. 3 months - 4 years)
  • Forward facing mode from 76 - 105 cm
  • Compatible to use with Britax Römer FLEX BASE 5Z (sold separately)
  • Extended rearward facing travel with more leg space
  • Can be used in forward facing position from 9kg
  • Deep, protective side wings with SICT technology
  • Safety 5-point harness with soft performance chest pads
  • One hand adjustable V-shaped headrest simultaneously with the harness
  • Excellent 360° rotation for easy placement and harnessing of your child (when used with Flex base)
  • Britax Römer Pivot Link ISOFIX System
  • Premium quality removable and washable covers


  • Rearward facing from 61 - 105 cm | up to 18kg (approx. 3 months - 4 years)
  • Forward facing available from 76- 105 cm | 9 kg - 18 kg
  • Dimensions: L74 x W44 x H48 cm
  • Weight: 6.8 kg

Car Seat Groups:

Car seats are categorised into the following groups and it is imperative that a category is chosen so the child's weight or height depending on regulation chosen, falls within the range indicated:


Child's weight*

Approx. age of child

Suitable For

Child's height†



Birth up to 13kg/29lb

Birth up to 12-15 months


40 - 85cm


0+ & 1

Birth up to 18kg/40lb

Birth to up to about 4 years


40 - 105cm


0+, 1, 2 & 3


Birth to 12 years


40 - 150cm




About 9 months to 4 years


85 - 105cm


1, 2 & 3


About 9 months to 12 years


85 - 150cm


2 & 3


About 4-12 years


105 - 150cm


*Applies to R44.04 seats. † Applies to iSize seats.

Note: some car seats will be approved in two or more groups. This just means that these seats have the ability to adapt as your child grows, meaning they can use them for longer.

Car Seat Compatibility
Isize Compatibility
Car Seat Facing
Rear & Forward Facing
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