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Maxi CosiEmerald 360 Pro

from 40 cm up to 150 cm

£379View retailers

Test score

Lowest available prices

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The Maxi Cosi Emerald 360 Pro car seat is a multi-stage i-Size car seat that’s designed to last your child from birth until they no longer need a car seat. It features an integrated Isofix base with 360-degree rotation and the option to slide the seat laterally towards you, to make it easier to get your baby into it. Read our review to find out whether this seat can provide a safe and comfortable journey from birth through childhood.

pros

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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?
Where can I buy it?

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

May 2026First reviewed by Which?
Mar 2025Released

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

22 Oct 2025

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.

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Prices updated daily

Prices are ordered from lowest to highest, irrespective of retailer rating or stock, and exclude any potential delivery costs. We are not able to show every possible retailer and cheaper prices may be available.

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All child car seat advice

General
Weight of child	0kg to 17kg
Seat size	from 40 cm up to 150 cm
Direction of travel	Reversible

Features
Weight of seat (kg)	15.7kg
Weight of base (kg)	0kg

Maxi CosiEmerald 360 Pro

Lowest available prices

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

Compare retailers

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

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Maxi CosiEmerald 360 Pro

Lowest available prices

pros

cons

What's included?

Test results

Specifications

Where to buy (4 retailers)

Best Buys & Don't Buys

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