This child car seat has passed the regulatory tests required by ECE R129/i-Size to be sold as suitable for children from 100cm to 150cm, which is from four to 12 years old.

But in our own tests, which are conducted at higher speeds and forces than the standard requires, we identified issues during the side impact crash test. The head of the crash test dummy hit the inside of the test car. Plus, the dummy readings, which are recordings of the forces imparted during a crash test were high, and also quite high during a front impact crash.

Due to this, the score was limited so that it became a Don’t Buy, and any child car seat that is a Don’t Buy due to poor safety ratings automatically becomes a 0% Don’t Buy.

Joiei-Provo

i-Size child
Vehicle seat belt

£45Typical price

Test score

Sign up to unlock the full expert review

The Joie i-Provo is a lightweight high-backed booster seat that aims to keep things simple and good value. Features include a 10-position headrest and two retractable cup holders, plus it weighs just 3.2kg. But did it provide protection in a front and side-on collision? Sadly no. Our crash tests, which go beyond the legal minimum regulations, uncovered some issues, particularly during the side impact test. Read the safety alert or our review to find out more information.

pros

Content has been blurred out, please log in to view.

cons

What's included?

What is it?
How safe is it?
Is it easy to fit?
Is the seat comfortable?
Is there anything else I should know?
Should I buy it?

Get Digital access at £9.99 a month, cancel at any time.

KEY TEST RESULTS
Safety rating
Fitting in car
Comfort of your child

Oct 2026First reviewed by Which?
May 2026Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

Two child safety seats in the back of an orange van, each holding a crash test dummy with green heads.

How we test baby and child car seats

6 Oct 2026

Safety rating

How we test safety rating

The overall safety score is made up of the results of crash testing (front crash; side crash) seat design, stability in the car and belt routing. Our crash tests go beyond the legal minimum requirements for UK car seat regulations and are conducted at higher speeds and forces than the regulations require. We feel our tests more accurately reflect what could happen in a real life crash.

Fitting in car

Overall
Buckling up
Avoiding misuse and instructions
Cleaning
Space required in car

How we test fitting in car

Fitting and using includes: How easy it is to install the seat correctly in the car. How easy it is to strap a child securely into the seat. How well the seat is designed in order to prevent incorrect use. How easy the seat cover is to remove and wash. How little space the seat takes up in the car and how comfortable your child is in the seat.

Ergonomics

Overall
Comfort of your child

How we test ergonomics

Our experts conduct an ergonomic assessment of each seat to make sure your child will be in the best position when travelling, along with the level of padding and support. Our tests also reveal how much space this car seat takes up in the back seat of a car and how easy it is to get your child in and out of the seat. Plus, our eagle-eyed car seat experts will check whether this seat affects how much space any front passengers have. This assessment was introduced to our site in May 2015. If a seat does not have this score, it was tested before May 2015.

General
Height of child	100cm-150cm
Seat size	i-Size child
Age group	Child
Direction of travel	Forward facing
Extended rear-facing seat	No
Installation type	Vehicle seat belt
Harness or shield seat	Vehicle seat belt
How is the child held in the seat?	No
Manufacturer URL	https://joiebaby.com/uk

Features
Adult seat belt	Yes
Isofix integrated into seat	No
Isofix base	No
Belted base	Yes
Type of Isofix	No isofix connectors
Swivel seat	No
Weight of seat (kg)	3.18kg
Part of a travel system?	No
Adjustable headrest	Yes

Suggested Alternatives

Kinderkraft

Mink Pro 2 (belted)

i-Size baby
Vehicle seat belt or isofix base

£50Typical price

Test score

Best baby or child car seats 2026
We reveal the best car seats for newborns, toddlers and children, based on our tough lab tests, plus expert buying advice on types and jargon
How we test baby and child car seats
We crash-test every baby, toddler and child car seat we review to reveal which ones give the best protection, and which you should avoid
Car seat weight groups and height groups explained
We explain how to choose a car seat that fits your child, whether it's a newer i-Size car seat or an older group 0+, 1, 2 or 3 car seat

All child car seat advice

Joiei-Provo

Sign up to unlock the full expert review

pros

cons

What's included?

How we test baby and child car seats

Safety rating

Fitting in car

Ergonomics

How this product's score compares with other child car seats we've tested

Suggested Alternatives

Kinderkraft

Related articles

Joiei-Provo

pros

cons

What's included?

Test results

Specifications

Best Buys & Don't Buys

Suggested Alternatives

Kinderkraft

Related articles