
BeSafe iZi Flex Fix i-Size Car Seat
Car Seat Features
- Forward facing 100cm to 150cm
- ISOFIX fitting
- Easy height adjustment
- Recline position
- Integrated carry handle
- Lightweight, just 7kg
- Three seats can fit side-by-side
- Shoulder & lap belt guides
- 2-Year warranty when registered
- Need help? Read our Car Seat Guide
About this Car Seat
Award-winning and innovative, the BeSafe iZi Flex Fix i-Size is the first i-Size compliant high-back booster seat on the market! This super safe seat is compliant with the new UN R129-02 regulation and is equipped with three layers of side impact protection and other neat features to ensure maximum protection for your little one as they travel.
Suitable for children from 100-150cm (approximately 4 to 12 years), the iZi Flex Fix has been developed for real-life situations, going above and beyond the requirements of the strict R129-02 safety laws. It has a comfortable shape for your little one to sit comfortably with a headrest that has been specially shaped to offer your little one an improved view and support when they are sleeping. The seat has an easy height adjustment to grow as your little one does, and a recline position as required. The seat has a slim design so it doesn't take up loads of room in the car, but it's also spacious inside for your little one to have plenty of space. The seat can be installed easily in your vehicle, using a combination of ISOFIX to add extra stability and of course, your vehicle's 3-point belt, which will be perfectly positioned to keep your child safe thanks to lockable shoulder belt guiders at the headrest and a soft, foldable laptop guider that helps with optimal positioning of the lap belt, also increasing comfort.
It's the safety of the Flex Fix that really stands out though. In addition to the dynamic flex performance, the seat comes with side-impact bumpers and SIP+ which absorbs additional force by deforming like a car's crumple zone and reducing side movement. A PAD+ is also included with the seat, which helps soften the belt as it sits on the chest as well as providing additional chin and chest protection. The seat can be easily installed in your vehicle forward facing and weighs just 7kg. The light weight of the seat and the integrated carry handle makes this seat ideal for transferring between cars for those families with more than one vehicle.
For further technical information or advice, please email your enquiry to our Child Seat experts - childcarseats@demon-tweeks.com or telephone the team direct on +44 (0)1978 667903
Height | 42cm |
Width | 52cm |
Depth | 64-82cm |
Weight | 7kg |
Brand | BeSafe |
MPN | 518001, 518002, 518003, 518007, 518009, 518013, 518050, 518064, 10010200-BURGUNDYM-STD, 10010200-CLOUDM-STD, 10010200-BLACKCABF-1STD, 10010200-CINTBLACKP-1STD, 10010200-CLOUDM-1STD, 10010200-METALLICM-1STD, 10010200-PEAKMESH-1STD, 10010200-SEAGREENM-1STD |
For international shipping please visit our delivery page.
For information about returning an item please visit our returns page.
Shop now. Pay later with Klarna.
We're excited to announce we have partnered with Klarna to bring you new ways to pay at checkout.
Here's how it works

Step 1
Add products to your cart and select "Klarna" when you check out

Step 2
Enter a few personal details and you'll know instantly if you're approved

Step 3
Klarna will send you an email confirmation and reminders when it's time to pay and you can manage your orders and payments in the Klarna app.
Payments Information
Pay in 30 days
Make your purchase today so you can try before you buy. Only pay for what you keep. Pay up to 30 days later. No fees when you pay on time*. Select the Klarna option and enter your debit or credit card information. To check your eligibility, Klarna will perform a soft search with a credit reference agency. This will not affect your credit score.
Paying after delivery allows you to try before you buy and is the easiest way to shop online.
- Complete the payment in full after purchase at no added cost.
- Report returns directly in our app and only pay for the items that you keep.
- Not making your payment on time could affect your ability to use Klarna in the future.
- Debt collection agencies are used as a last resort
You must be 18+ and a UK resident to be eligible for this credit offer.
*Klarna's Pay in 30 days is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Ts&Cs and late fees apply. Pay Later Terms and Conditions
Pay in 3 interest-free instalments
Spread the cost of your purchase into 3 interest-free instalments. The first payment is made at point of purchase, with remaining instalments scheduled automatically every 30 days. No interest and no fees when you pay on time*. Select the Klarna option and enter your debit or credit card information. To check your eligibility, Klarna will perform a soft search with a credit reference agency. This will not affect your credit score.
- A new way to pay that's an alternative to a credit card.
- 3 instalments gives you flexibility to shop without interest.
- Not making your payment on time could affect your ability to use Klarna in the future.
- Debt collection agencies are used as a last resort.
You must be 18+ and a UK resident to be eligible for this credit offer.
*Klarna's Pay in 3 is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Ts&Cs and late fees apply. Pay in 3 Terms and Conditions
Spread the cost for up to 36 months
Spread the cost of your purchase with monthly plans between 6 and 36 months. The first payment is made when your order is shipped. The remaining instalments are scheduled automatically every 30 days. Select the Klarna finance option and enter your information. Klarna will perform a full credit check with a credit reference agency if you choose this option.
- A new way to pay that's an alternative to a credit card.
- Instalments gives you flexibility to shop for higher priced items.
- Not making your payment on time could affect your ability to get credit in the future.
You must be 18+ and a UK resident to be eligible for this credit offer. Klarna Credit Agreement Terms and Conditions
About Klarna
Pay online or in the app
Review your latest purchases and make payments in the Klarna app or online.
- Download the Klarna app: https://www.klarna.com/app
- Log in online: https://app.klarna.com/login
- Chat with customer service: https://www.klarna.com/uk/customer-service/
Safe and secure
With Klarna, you are always covered through Klarna's Buyer Protection policy. Modern safeguards protect your information to prevent unauthorized purchases.
Frequently asked questions
Visit our FAQ page (https://www.klarna.com/uk/customer-service/) to find out more about using Klarna.
About Klarna
At Klarna, we have a relentless focus on creating the best shopping experience in the world. We believe payments are so much more than just a way to send money. That's why our smooth checkout options give you more time and control so you can focus on the things you love.
- More than 90 million shoppers are using Klarna.
- 200,000 retailers are working with us worldwide.
- We're one Europe's largest banks and we've been powering online checkouts for over 15 years.
Demon Tweeks acts as an introducer and not a lender of unregulated credit products provided by Klarna Bank AB (publ). Credit is only available to permanent UK residents aged 18+, subject to status, T&Cs apply.
Please note Pay in 30 days and Pay in 3 instalments is not regulated by the FCA. Borrowing beyond your means could seriously affect your financial status, ensure you can afford to make your repayments on time by the due date.
Please spend responsibly. Borrowing more than you can afford could seriously affect your financial status. Make sure you can afford your monthly repayments on time.