What type of filling the pillow has, whether it's polyester, latex or foam and feather. Sometimes it's a mixture.

We recommend pillows that achieve an overall score of 85% or more.

The CHOICE Expert Rating is made up of the following weightings: fatigue score (35%), comfort score (30%), fold score (20%) and sink score (15%). You can decide for yourself which one of these are more important but we've made this call based on consumer feedback.

We compress each of the pillows under 100kg weight for 100 hours to speed up the process of ageing, then we measure the decompression once they're released.

The comfort score is made from the side sleeping results (70%) and back sleeping results (30%), based on consumer feedback on sleeping styles.

This measures the angle of the head and how level it is when lying on the pillow in a side sleeping position.

This measures the angle of the head and how level it is when lying on the pillow in a back sleeping position.

A simple fold of the pillow to see how well it springs back to normal. Most pillows achieve this well.

Using a 5kg weight, how far does the simulated head sink into the pillow? We measure this for a sink score to see whether it keeps someone elevated.

Recommended retail price at the time of testing.

What we paid in store when we bought the pillows. Quite often you'll be able to find pillows on sale for a cheaper price.

The difference between the recommended retail price and the price we paid.

Some (but not all) pillows do have a claim for their firmness, much like a mattress does.

How high the pillow is, measured in centimetres.

How wide the pillow is, measured in centimetres.

How long the pillow is, measured in centimetres.

How heavy the pillow is, measured in kilograms.

Does the pillow claim to be washable?

Any instructions for washing included on the pillow itself.

Does the pillow come with a cover?

What the pillow or packaging claims as to where the product was made.

The website of the retailer or manufacturer.

Is the cover that comes with the pillow removable?

Does the pillow have a recommendation on when to replace it? Listed in months where available.

Are there any ethical claims made on the pillow or its packaging?

Are there any antimicrobial claims on the pillow itself or its packaging?

Does the pillow make any claims about extra neck support?

Is the pillow being endorsed by any particular organisation?

Is there any claim on the pillow or packaging around warranty?