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Save £167

Britax Römer dualfix i-Size car seat - cosmos black

Price £262.50
RRP £430.00
Out of Stock
Colour: cosmos black

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Britax Römer dualfix i-Size car seat is rated 4.5 out of 5 by 26.
Rated 5 out of 5 by from So easy to use. Bought this seat a few weeks ago as my baby wasn’t happy in her infant carrier. After lots of research decided on this swivel seat as it fared well in the WHICH and ADAC crash tests (better than the joie ones). Also read good reviews about babies being happy. Am absolutely loving the swivel function. So easy to get baby in and out. The only things to note are that it is quite big and bulky. When rearfacing our passenger seat is a bit squished and we have a bmw 5 series so very spacious normally. Also wish there was something to hold the straps aside like in our maxicosi cabriofix previously but its really such a minor thing as the seat otherwise has been amazing. Would absolutely recommend!!
Date published: 2019-03-01
Rated 5 out of 5 by from So easy to use! I bought this at seat a month ago after struggling with Cybex Cloud Q for months, It was so restrictive my baby cried all the time. Britax is amazing, my baby loves car rides now, it is highly positioned so baby can see out the window and enjoy world outside. It is also so easy to adjust and turn I can do it all with one hand. The only thing I would improve is recline, I wish it was reclining further as baby’s head still hangs to the side at times
Date published: 2019-02-23
Rated 5 out of 5 by from Brilliant Car Seat! I brought the pink one for my Daughter she is 15 months old and it's great she loves being in her new car seat she looks so comfy and sleeps well. So easy to get her in and out of the car to.
Date published: 2019-01-30
Rated 5 out of 5 by from Amazing I cannot rate this car seat enough! My 7 month old loves it! The quality is amazing! Very sturdy and makes life soo much easier with the 360 swivel and able to recline the seat for when baby is sleeping! As always the staff in store were very helpful! 5 stars for Mothercare! Thank you
Date published: 2018-12-01
Rated 5 out of 5 by from Perfect seat I brought this a month ago, because my original car seat was getting to heavy when carrying with my baby girl from house to car. She was 7 months and needed a car seat with more space for her to move and I wanted one that 360 swivel, isize and reclined a lot. This was perfect as did did them all. So happy with it and should last till she is 4 years old. Also had a high safety review on WHICH...
Date published: 2018-11-30
Rated 5 out of 5 by from Brilliant! The best car seat on the market Bought it a few weeks ago after mother in law bought one and other of us absolutely love it. Baby looks so comfortable in it, the buckle is easy to use and the straps pull tight with ease too. They are all hand made chairs and you can tell. Brilliant. So pleased with it, would recommend spending a little bit more money on this chair compared to anything else available. the angle of the seat is also really good as it reclines loads more than others and baby’s head doesn’t fall forward when sleeping. We went from a birth seat that was lay flat and this is pretty similar for bigger kids, which is a great feature.
Date published: 2018-10-25
Rated 5 out of 5 by from Fab seat Really nifty easy to use and is really secure for the little one. Bought as another seat for my twins.
Date published: 2018-09-28
Rated 5 out of 5 by from Good solid car seat I bought this car seat after reading its review by Which, it received 5/5 on crash tests rear facing and the fact my daughter can stay rear facing in this seat until she is 4 it s great. The 360 spin is great although you need to sort of fiddle about with it to do this one handed when holding the baby and needing to turn it but I’m sure with practice I will work this out! It is a very big seat though, we have a Ford Focus and having this seat means my husband can’t sit in the passenger seat anymore as I t takes up so a lot of room. But I feel well worth the money.
Date published: 2018-09-20
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Questions & Answers

What is the difference between the britax romer dualfix m i-size car seat and the dualfix i-size?

Asked by: Crystalstarbuck
Thanks for your query. The Dualfix M i-Size offers 12 recline positions – rearward and forward facing – and an adjustable rebound bar for ultimate comfort up to 4 years. Regards
Answered by: paulsu
Date published: 2018-11-24

What age/weight do you reccomend taking out the first insert with padded sides? 

Asked by: Kelly
Hello, We do not recommed an age, it would all depend on when you feel the child is big enough to sit securley in the seat without the insert. I hope this helps.
Answered by: Chelsea
Date published: 2018-12-06

How do you remove the seat from the base? 

Asked by: Stephen
Hello, Thank you for your query. The seat cannot be removed from the base. Regards,
Answered by: CharlotteA
Date published: 2018-12-09

can this car seat be reclined to a safe position for a newborn whilst asleep i.e.lie flat? also can it be attached to any pushchairs?

Asked by: char92
Hello, Thank you for your query. This offers recline options, it is designed so that the positioning is safe for newborns when traveling and napping in the car. It is not compatible with pushchairs. I hope this helps.
Answered by: KayleighE
Date published: 2019-09-14

Does the isofix base come aswell as the car seat?

Asked by: Beth18
Thanks for your query. Yes the base is included. Regards,
Answered by: paulsu
Date published: 2018-10-01

Hello, does this have a handle to carry the seat to & from the car?

Asked by: Dearbecks
Hello, Thank you for your query. This does not have a handle, this feature is generally usually only available on baby (0, 0+) car seats. I hope this helps.
Answered by: KayleighE
Date published: 2018-04-16

does this car seat fit the 3-door corsa?

Asked by: Kamila
Hello, Thank you for your query. Please contact your local Mothercare store on any car seat compatibility queries and a trained car seat member of team can assist. Please use the link below to find your local stores contact details. I hope this information is of help.
Answered by: Chloe G
Date published: 2018-10-09

Can this car seat be removed and put on to pram wheels?

Asked by: Chrissie65
Hello, Thank you for your query I am sorry this is not pushchair compatible. I hope this helps
Answered by: donnad
Date published: 2018-03-09
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maternity fitting and sizing guide

We fit our garments on mums to be so that we fully understand her needs during pregnancy, making sure the clothes look good and are comfortable.

Check your measurements against our size chart to ensure you are buying the right size.

Remember that we are all different shapes & sizes and sometimes we can sit in the middle of a size. Trying a size above or below can help achieve the most comfortable fit for you.

Our well designed maternity clothes are versatile and often suitable for post-pregnancy.

  8 10 12 14 16 18 20
European size 36 38 40 42 44 46 48
dual size guide S M L XL
full bust (pre-pregnancy) 82 87 92 97 102 107 112
full bust 86 91 96 101 106 111 116
dual size bust 86-91 96-101 106-113 111-116
waist (pre-pregnancy) 64.5 69.5 74.5 79.5 84.5 89.5 94.5
Bump circumference (early stages - 3rd trimester) 87 - 96 96 - 101 97 - 106 102 - 111 107 - 116 112 - 121 117 - 126
Low hip (pre-pregnancy) 93 98 103 108 113 118 123
dual size hip 93 - 98 103 - 108 113 - 118 118 - 123
thigh 52 55 57.5 61 64 67 70

mothercare bra band size

inches 32 34 36 38 40 42 44 46
cm 70 75 80 85 90 95 100 105

mamalicious size guide

  EUR XS / UK 6 EUR S / UK 8 EUR M / UK 10 EUR L / UK 12 EUR XL / UK 14
Bust 86 90 94 98 102
Under Bust 68-72 73-77 78-82 83-87 88-92
Hip 91 95 99 103 107
  See the Full Size Guide

sizing guide for babies & children

So no matter if you are looking to buy newborn baby clothes, sleepsuits or nightwear you can ensure you buy the correct baby clothing based on the baby's weight or height. If you are looking to measure your babies feet, check out the mothercare shoe sizing guide.

Please refer to the guide below to help you find the size that is right for your baby or child.

premature / newborn sizing

Size 3lb Premature 4lb Premature Tiny Baby New baby up to 1 months 1 - 3 months 3 - 6 months 6 - 9 months 9-12 months
Height (cm) - - 50 56 62 68 74 80
Weight (kgs) 1.4 1.8 2.3 3.4 4.5 6.5 8 9 -
Weight (lbs) 3 4 5 7.5 10 14.5 17.5 20 -
Hips (cm) 3 4 5 7.5 10 14.5 17.5 20 -

girls & boys clothing sizing

Size 12 - 18 months 18 - 24 months 2 - 3 years 3 - 4 years 4 - 5 years  5 - 6 years 6 - 7 years 7 - 8 years
Height (cm) 86  92 98 104 110 116 122 128
Chest (cm) 50.5 53 55.5 57 58.5 60 62.3 64.5
Waist (cm) 51 52 53.5 54 54.5 55 57 59
--> See the Full Size Guide

footwear sizing guide

The Mothercare Baby Shoe Sizing Guide is a handy print out that will allow you to position your little one, (if they stop wriggling!) onto the foot outline, giving you both UK and Euro sizes. With a 3 point fit test and points to ensure you are getting an accurate foot measurement, the Mothercare shoe sizing guide is a must.

Mothercare also have a handy baby & kids clothing size guide, so be sure to check the chart before making any baby clothes purchases.

See the Full Size Guide