# Maxi-Cosi Kore i-Size High Back Booster Seat, 100–150 cm

The Maxi-Cosi Kore i-Size is a forward-facing high-back booster listed for children from 100 to 150 cm. It combines ISOFIX installation with a seat-belt guide and height-and-width adjustment, so it is aimed at families wanting a booster that can adapt as a child grows.

- [Original product page](https://bargainpostbox.co.uk/product/maxi-cosi-kore-i-size-high-back-booster-seat)
- [View offer](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Maxi-Cosi
- Model: 8740550110
- Category: Cars & Motorcycles > Vehicle Accessories
- Price: 124.99 GBP
- Previous price: 179.99 GBP
- Discount: 31%
- Price checked: 2026-11-14T09:49:59.569Z
- Rating: 4.5 / 5
- Reviews: 1413

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The listing describes an i-Size Group 2/3 seat for 100–150 cm, approximately 15–36 kg.
- The backrest adjusts in both height and width to accommodate growth.
- The open seat design and belt guide are intended to make buckling up easier for children.
- The Side Protection System Plus is described as glass-fibre shock absorbers in the side wings combined with energy-absorbing material.
- The cover is removable and machine washable, according to the listing.

## Pros

- Height and width adjustment gives more scope to adapt the backrest as a child grows.
- ISOFIX installation is intended to stabilise the seat, while the vehicle seat belt secures the child.
- The open lower design provides access to the buckle and the belt guide is intended to help position the belt.
- The removable, machine-washable cover is useful for managing spills.

## Specifications

### Identity
- Brand: Maxi-Cosi
- Model: 8740550110
### Child fit and installation
- Recommended height range: 100 Centimeters
- Maximum height recommendation: 150 Centimetres
- Minimum weight recommendation: 15 Kilograms
- Maximum weight recommendation: 36 Kilograms
- Installation type: Isofix
- Orientation: Forward Facing
- Harness type: 3-Point
### Dimensions and installation
- Dimensions listed: 44D x 51W x 76H centimetres
- Weight listed: 5.97 Kilograms
### Materials and protection
- Material listed: Graphite, glass
- Colour: Authentic Graphite

## Before you buy

- The listing calls the seat a 3-point harness model, while its description says the child is secured with the car's seat belt and the seat has a belt guide. Confirm the restraint method and age, height and weight guidance in the current instructions before use. The listing also gives a rear-facing maximum weight despite describing the seat as forward-facing. These details are inconsistent and do not establish a rear-facing capability.

## A good fit for

- Families looking for a forward-facing high-back booster listed for children 100–150 cm.
- Buyers who want ISOFIX fitting and a backrest that adjusts in height and width.
- Children who are ready to use the vehicle seat belt with guidance from the seat.

## Less suited to

- Children below the listed 100 cm minimum height or outside the applicable guidance in the current seat instructions.
- Buyers seeking a rear-facing seat or a seat with a separate internal harness, unless the manufacturer’s current instructions confirm suitability.

## Customer feedback

Customer feedback reports comfort, sturdy construction, ease of installation and a good fit. Some feedback is mixed on the seat belt experience and value for money. Those points matter in day-to-day use, since the listing relies on the vehicle belt and a belt guide, but feedback does not establish how well it will suit a particular child or car.
- Positive themes: Customers report comfort, easy installation, good fit and sturdy construction.
- Mixed feedback: Feedback on the seat belt experience and value for money is mixed.

## Frequently asked questions

### What height range is the Maxi-Cosi Kore i-Size listed for?
The listing states 100 to 150 cm and approximately 15 to 36 kg. Follow the current seat instructions and applicable guidance for your child.
### How is the Kore i-Size installed and how is the child restrained?
The listing describes ISOFIX installation and use of the vehicle seat belt with a belt guide. A separate detail labels the harness as 3-point, so check the current instructions to confirm the restraint arrangement.
### Does the seat adjust as a child grows?
Yes. The listing says the backrest adjusts in both height and width.
### Can the cover be washed?
The listing says the cover can be removed and machine washed. Follow its care instructions.

## Alternative options

- [Maxi-Cosi RodiFix M i-Size, High Back Booster Seat, 3.5 - 12 years, 100 - 150cm, Kids Car Seat, G-CELL Side Impact Protection, Adjustable Height, Quick & Easy Buckle Up, ISOFIX Car Seat, Basic Black](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Maxi-Cosi RodiFix S i-Size, High Back Booster Seat, 3.5-12 Years \(100-150 cm\), Child Car Seat, 3 Recline Positions, Adjustable Height/Width, G-Cell Side Impact Protection, AirProtect, Tonal Black](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Maxi-Cosi RodiFix S Comfort i-Size, Car Seat, 100–150 cm, Authentic Black \| Adjustable High Back Booster Seat, 3.5–12 Years, 3 Recline Positions, G-CELL Protection, AirProtect, Breathable Fabrics](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Maxi-Cosi Nomad XL Plus, Evolutive Car Seat, 76–150 cm, Authentic Black \| Foldable Travel Car Seat, 15 Months–12 Years, Ultra-Compact & Lightweight, G-CELL Side Impact Protection, Travel Bag](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Maxi-Cosi Kore Pro i-Size High Back Booster Seat, 3.5-12 Years, 100-150 Cm, ClickAssist Light, ISOFIX Car Seat, Adjustable Height/Width, Side Protection System Plus, Authentic Black](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [globalkids i-Size High Back Booster Car Seat, Group 2/3 ISOFIX Toddler Car Seat, with Cup Holder, Adjustable Headrest/Backrest/Width, 3–12 Years, 15-36 kg, 100cm-150cm, Black](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Maxi-Cosi RodiFix S i-Size, Booster Seat, 100–150 cm, Tonal Graphite \| Child Car Seat, 3.5–12 Years, ISOFIX, 3 Recline Positions, Adjustable Height/Width, G-CELL Side Impact Protection, AirProtect](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Kinderkraft UNITY2 Car Seat I-Size 100-150 cm, Child Seat with Isofix up to 12 Years, Safety Systems, Easy to Clean, Breathable Cover Material, Black](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Kinderkraft I-Spark I-Size Baby Car Seat, Group 2/3, 100-150 cm, from 3.5 to 12 Years, 15 to 36 Kg, Light \(4.85 Kg\), 3-Point Seat Belt, Side Protection, Green](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Kinderkraft Junior FIX 2 PRO Child car seat 100-150 cm, ISOFIX + seat Belt Install, H-Guard headrest, SPS Side Protection, Clear Belt Guides, AIR Flow Breathable Upholstery, Green](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Kinderkraft I-Spark 2 PRO i-Size Car Seat 100-150 cm, 2-in-1 Booster, H-Guard, SPS, 10-Level Headrest, Universal Installation, Grey](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Aya TravelFold i-Size Booster Car Seat \| Group 2/3 \(100-150cm\) \| Compact, Foldable & Lightweight Travel Car Seat for Kids \(Stone Grey\)](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)

## Add-ons

- [SMART ELF 2 pack Car Seat Protector - for kids/Pet, Thickest Padded Cover \| Child with Waterproof Fabric, Featuring Best Size Coverage Available & Organiser Pockets - Fits Isofix Sedan SUV Truck -Black](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)
- [Maxi-Cosi Tanza i-Size, High Back Booster Seat, 100–150 cm, Full Black \| Compact Foldable Car Seat, 3.5–12 Years, 10 Headrest Positions, G-CELL Side Impact Protection, Comfortable Padded Seat](https://bargainpostbox.co.uk/visit/maxi-cosi-kore-i-size-high-back-booster-seat)

## Images

![Maxi-Cosi Kore i-Size High Back Booster Seat, 100–150 cm — 1](https://bargainpostbox.co.uk/i/VzQCOi1OGELpYxF4Tui7bbpRGL0W2ONwZ_raximMbJabeTDJWEnhuy6o7zS35MVhTcevIac2cWLcXGIxHkYhJqp73IG7XcFuJJ57m9AJlb-PCdnqqugGgbAi.jpg)

![Maxi-Cosi Kore i-Size High Back Booster Seat, 100–150 cm — 2](https://bargainpostbox.co.uk/i/0Xa52UbfKjjp_yB1vkcS7TEUPQQeIRnF3jlE7mdhZPPElacAtIoLfUm_NwlUPD_TiQ8GwdmbcBrwUTkFp-9WI5xXfqMRqiMFzHKupJXepDEWMq0SbYFLnqu9.jpg)

![Maxi-Cosi Kore i-Size High Back Booster Seat, 100–150 cm — 3](https://bargainpostbox.co.uk/i/DxqC_lP1fhWQp8PKCoeO48Xm4uBYjQ4MTc141EyaF6tFTcBJEAbUBY4-mgdXZN-iujoTbq7VnpU9mYJORe7u7orMyWDqzHdOWshZDDxJnBfr43O3.jpg)

![Maxi-Cosi Kore i-Size High Back Booster Seat, 100–150 cm — 4](https://bargainpostbox.co.uk/i/SiBUGDXIIEk-H9BN_wB5SC6HEUk4ZQ6OsAY3J-uJTtj2mN8uMFJNZ3JP0iytlxXd09UKy2KyOEGAMl-8n_UFX5Nlc3fOHcR7meUYvRefaknLxc4_.jpg)

![Maxi-Cosi Kore i-Size High Back Booster Seat, 100–150 cm — 5](https://bargainpostbox.co.uk/i/MlPmgmTT1VeND-LgheB2B_rkY6XvC3i6lFzJJIWWVAQ7ACURP57YKF1aa6IBs4e7LdvmoeMv1g3lc7HBQx7oHYGPcGTIn4nnkHTlPdk-3OkKO4BY.jpg)

![Maxi-Cosi Kore i-Size High Back Booster Seat, 100–150 cm — 6](https://bargainpostbox.co.uk/i/rivnPxz5dYSC_1J6DKj2UhSJd9ScOX7neV6pd3jVU57km_xPA43pZiRweK9RLQh-ET8UrL0tdJxrcjIwkb1g5cJeVPZPCo3cR4uFPnPB5_TkasTjLXXAKSgI.jpg)