Britax Römer Kidfix SL Highback Booster Black Series Cosmos Black

Save 23%

£85 £110
Use ‘XMAS10’ in cart for a 10% discount at checkout!
Available for immediate dispatch

Britax Römer's Kidfix SL is a chic highback booster seat designed to suit any vehicle due to its flexible installation options. Featuring innovative soft-latch connectors and 3-point seat belt compatibility, the Kidfix SL enables easy transfer and installation to meet the needs of parents with even the busiest of lifestyles.

Not only does the Kidfix SL ensure your child meets the height requirements for safe travel, it also offers additional levels of protection for your child so you can be safe in the knowledge that they are protected in the event of collision. The seat shell, softly padded headrest and side wings in addition to the clever installation provide head-to-hip protection for your little one ensuring every journey is safe. 

Using the car's ISOFIX anchorage points the Kidfix SL can be quickly and simply installed so that it is permanently attached to the vehicle even when there's no child in the seat. This is made even easier using the soft-latch connectors that attach individually and make finding and securing the anchorage points much simpler.

Designed for ease, the Kidfix SL also features seat belt guides which are designed to automatically adjust every time you need to adjust the height of the headrest so you don't have to worry about whether your child's seat belt is in the safest position - it will be automatically

The Kidfix SL also boasts an adjustable V-shaped backrest to provide ultimate comfort for your growing child throughout their childhood. The smart backrest also allows adjustments to match the angle of the vehicle's seat, providing an even better fit and further comfort for your child on every journey.

The headrest is also ergonomically designed to support your child's head when they fall asleep and can be easily adjusted using only one hand while they are in the seat, so that you can ensure the perfect comfort and safety fit for your child even after they have got in the car.

The Kidfix SL features a machine washable, removable cover so that if things get messy in the back seat, all you need to do is remove the cover and throw it in the washing machine for a quick and easy cleaning solution.

The Kidfix Collection features a wide variety of amazing car seats by Britax Römer, click here to view the full range of Kidfix car seats from Britax Römer. 

Key Features

  • ISOFIX installation and protection 
  • Suitable from 100-150cm 
  • Innovative soft-latch connectors
  • 3-point seat belt compatibility
  • Adjustable headrest
  • Adjustable V-shaped backrest
  • Softly padded headrest and side-wings
  • Machine washable, removable cover


Group: 2/3
Weight suitability: Forward-facing, 15kg - 36kg
Age suitability: from 3.5 - approx. 12 years

Dimensions: 67 – 85 x 51 x 38cm
Weight: 6.4kg

If you place an order by 12pm between Monday to Friday of an item marked as available for immediate dispatch we will ensure the order is dispatched the same day.  Orders received after that time will be dispatched the following working day.  
Availability denotes the length of time the item will take to be available to dispatch. 
Shipping denotes the duration of time that an items takes to reach its destination the either our warehouse or manufacturer's warehouse.  For example an item with "Available in 7-10 working days" and "Standard Delivery" should be expected in 9-12 working days.  Please note working days excludes weekends and bank holidays. 

Our secure website and payment gateways perform a number of security checks against an order.  Any errors on the order could result in delays while we attempt to contact you to clarify any inaccuracies.  At Baby & Co we use a number of carrier services to ensure prompt and speedy delivery, this may include using more than one carrier for an order, however this is rare.
Your order may be dispatched from more than one location including our warehouse or directly from the manufacturer this may result in your order arriving on more than one consignment.  Aside from made to order items and direct delivery we offer the following delivery options. 

With the exception of made to order items and products sent directly by the supplier below you will find our standard delivery terms.  Please note that we only ship within the United Kingdom. 

Please note the following brands only deliver to UK mainland post codes, excluding some Scottish post codes:- Kidsmill, Europe Baby, Boori, East Coast, Tutti Bambini, Mamas & Papas, Silver Cross furniture.

Please note that some nursery furniture deliveries will be to the customer's door, this may exclude internal apartment doors.

Standard Delivery
Region Rate Delivery Schedule
U.K. mainland Orders over £49.99 - Free
Orders £49.99 or under - £4.95
2-3 working days
Scottish Highlands £18 per order
U.K. Islands
& Isle Of Wight
£18 per order
Northern Ireland £18 per order
Please note - our carriers only work Monday to Fridays (8am - 6pm). We regret our carriers cannot deliver at a specific time. ALL deliveries must be signed for.


Express Delivery
Region Rate Delivery Schedule
U.K. mainland Orders over £49.99 - £7.95
Orders £49.99 or under - £9.99
1-2 working days
Scottish Highlands £18 per order
U.K. Islands &
Isle Of Wight
£18 per order
Northern Ireland £18 per order
Please note - our carriers only work Monday to Fridays (8am - 6pm). We regret our carriers cannot deliver at a specific time. ALL deliveries must be signed for.


All returns are processed through the retailer and not the manufacturer; please contact us regarding any after sales issues. We endeavor to offer an impartial returns procedure for the benefit of all parties. To enable us to process your claim as efficiently as possible please follow this procedure, failure to follow this procedure could result in delays in processing your claim or return. 

In the first instance contact our returns department on or write to us with the following information:

  • Order Number
  • Name (Person who placed the order)
  • Contact telephone number.
  • Date of Purchase
  • Faulty Item (Product description)
  • Details of Fault (Description of fault)
  • If possible digital photos could also be sent to help identify the problem.

We will then, depending on the issue, either contact you to discuss the matter further or issue you with a returns authorisation number. Please note returns sent back without a returns number may be refused or could result in delays in processing.

If it is felt that the goods need to be returned for inspection you will need to do the following.

  • Box the item ready for collection. It is wise to retain the original packaging for this purpose. Our shipping company will not collect items which are not properly packaged
  • Contact us at to arrange collection. Please book your collection at least 2 days in advance and between Monday – Friday. Collections are usually made during the afternoon via Parcel Force. Please allow at least a 4 hour window when you will be available. If a collection is scheduled and you are not home as arranged you will be charged a £8.00 for the aborted collection
  • Please include your Returns Authorisation Number (RAN), proof of purchase and a description of the fault.

If you are not satisfied with your purchase, please return unused and its original packaging with any tags still attached for an exchange or refund. We do not accept returns on personalised items or hygiene sensitive items including duvets and mattresses once they have been removed from their protective wrappers. This does not affect your statutory rights.

  • We will refund the full amount to the original payment method excluding any shipping costs
  • Credit/debit card refunds can take up to 10 working days to be processed by your bank, we are unable to expedite this process.
  • Returned orders remain the customer's responsibility until safely received by us. We recommend using a reliable carrier and insuring the parcel for loss or damage. Alternately you can take advantage of our carrier service please contact us for a quotation.
  • Replacements, refunds or exchanges of damaged or incorrectly ordered items will not be processed until the original items are received and inspected.
  • If goods form part of a bundle then the whole order will need to be returned or the remaining items will revert to their normal recommended retail price and you will be refunded accordingly.
  • We reserve the right to refuse a refund if the condition of the goods are subject to normal wear and tear, misuse or damage.

Please note we are unable to offer a loan or replacement product while your return is being inspected or repaired. Proof of purchase must accompany any warranty claim. Most nursery items come with a 6 months guarantee; however some products have longer warranty periods, please check your warranty book for more details. This does not affect your statutory rights. If a fault develops within the guarantee period, we will arrange collection and inspection in our workshop. If the failure is confirmed to be due to a manufacturing fault we will arrange repair, or replacement if the repair in uneconomical.
If the fault is due to fair wear and tear, damage or misuse we will quote for a rectification and you will also be liable for the carriage charges, which are currently £18 per parcel*.
In the event of a dispute as to the cause of the failure the product will be sent to the manufacturer who will establish if the fault is covered by the manufacturer’s warranty. 
In the event the manufacturer identifies the fault is due to fair wear and tear, damage or misuse you will be liable for all carriage costs and any repair costs if you wish the product to be repaired.
Our workshop will be happy to quote for any non-warranty repair. All returned product must be carefully packed in cardboard. It is wise to retain original cartons for this purpose. If a collection is scheduled and you are not home as arranged you will be charged £8.00 for the aborted collection.
For furniture returns please read our terms and conditions page under the section Nursery Furniture Return Conditions.

Payment & Security

American Express Apple Pay Google Pay Klarna Maestro Mastercard PayPal Shop Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Recently viewed