Be Cool Mars 100-150cm i Size Car Seat

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by Be Cool
In stock
Delivery time: 1-3 working days

This product will be delivered to you within 1-3 working days*.

As soon as your order leaves our warehouse, we will share tracking details.

*This is the average delivery time frame for this product.

Delivery cost

We offer a free delivery service for all orders over £50 to mainland UK addresses*. If your address falls out side of this area there may be additional carriage fees. This will be displayed clearly on the checkout/basket page.

*Except Two-Man Delivery. Unfortunately due to rising, costs some larger items by certain brands may incur extra carriage charges that we must pass on to you. Most of these are White Glove Deliveries where the delivery drivers will deliver to a specific room of your choice.

For more information please call us on 01902 490 211. 

Please note that if your order falls below the £50 threshold your order will have a £5.95 delivery charge.

Read more about Ordering and Deliveries

Shipping details

We will keep you informed of the status of
your order at every stage. If you haven’t received any emails please check your
spam folder as they can sometimes fall in there.

Delivery zone

At the minute we are delivering only to the
postcodes within the UK Mainland which means we do not deliver to:

  • Ireland
  • Northern Ireland
  • Scottish Highlands 
  • Chanel Islands
  • Isle of Man
  • Isle of Arran and Millport
  • Orkney Islands, Golspie, Halkirk, Kirkwall,
    Dunbeath, Helmsdale, Brora
  • Isle of Wight
  • Isles of Scilly
  • Shetland Islands
  • Isle of Anglesey

Please note: If we
receive an order with a delivery address in the zones above, we won't be able
to process the order and the refund will be issued immediately.

Read more about Ordering and Deliveries

Return policy

Return Timeframe

We operate a 14-day returns policy, meaning you have 14 days from the receipt of your item to request a return.

Eligibility for Return

To qualify for a return, your item must be in the same condition as when you received it, unworn or unused, with tags, and in its original packaging. You will also need to provide the receipt or proof of purchase.

To initiate a return, please contact us at and attach pictures of the item from the front, side, and back, along with images of the original packaging. If your return is accepted, we will provide you with a dedicated warehouse address for your return, along with instructions on how and where to send your parcel at your own expense. Returns sent to us without prior authorisation will not be accepted.

If you have any questions about returns, you can always reach out to us at

Click Here to read full Return policy

Fall in love with the Be Cool Mars i-Size car seat. For a secure and stable installation, the child seat is attached using your car’s seat belt and ISOFIX system.

To install, place it on the back seat of your car, click the child seat onto your car’s ISOFIX connectors and use the seat belt to buckle up. After the ISOFIX installation, your little one can buckle up all by themselves. Most cars today have ISOFIX, so there is a big chance yours will have it too. If not, then don’t worry as this car seat can also be installed without ISOFIX. Simply use the seat belt of your car to buckle up.

This Car Seat is certified by the R129 i-Size standard from 100 to 150 (from 3 to 12 years old approximately). The different headrest heights mean the seat adapts to suit the child in all his stages of growth, the reclining positions of the backrest mean that it fits well against the seats of different vehicles and the SPS (side protection system) helps to absorb energy in the event of side impact.


  • Suitable for children from 100 cm up to 150 cm in height (from 3 to 12 years approx.).
  • The different headrest heights mean the seat adapts to suit the child in all his stages of growth.
  • The reclining positions of the backrest mean that it fits well against the seats of different vehicles.
  • Installation with the vehicles Seat Belt and Isofix system.
  • Side Protection System.
  • Universal approval.
  • Removable and washable upholstery.
  • Complies with European Safety Standard ECE R129 (i-Size)
  • Dimensions: 81-58 x 44 x 44 cm
  • Weight: 7.5 kg
What’s Included:
  • Mars Car Seat
  • Isofix base attached (included)
  • Instruction booklet

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