References

Latest References

Four Seasons mattress
What pillows do Four Seasons Hotels use? You can actually buy them -- and their budget alternatives

By Becky George Last updated

You can create a luxurious hotel sleep at home with these plush Four Seasons pillows.

Pillows & Bedding
A woman with a bigger build sits up in bed smiling. To the left, an insert showing a close up of a hand holding the corner of a thin mattress or thick mattress topper
Are 8-inch mattresses good for heavy people? I'm a sleep writer, here's my take

By Ruth Jones Published

We explore if eight-inch mattresses can deliver the support and comfort a person weighing over 250lbs needs in a mattress.

Mattresses
An image of sleep writer Becky George sleeping on a bed in our Sleep Lab. To the left is a cut out image of a blackboard showing basics of learning Chinese, implying she's learning a new language as she sleeps
Sleep, learning and memory — experts explain the 'magic elixir' that can make 2026 your best year yet

By Ruth Jones Published

Want to learn a new skill? Sleep on it. Experts explain why sleep is key to memory and how you can maximize your rest to level up your New Year's resolutions.

Sleep
A woman naps on the sofa during the middle of the day
Can you really ‘catch up’ on lost sleep during the holidays? Two sleep experts weigh in

By Julie Penfold Published

Do your festive plans involve oversleeping and midday naps? Experts explain why the holiday break might not be the chance to make up for several weeks of bad sleep.

Sleep
A collage of our sleep tech reviewer testing various sleep trackers in our studio. Laying in bed with white sheets wearing the Oura Ring 4 (top left). Apple Watch 10 with purple strap on wrist displaying sleep stages data (top right). All sleep tracker on arm resting on Withing sleep mat (bottom left). Checking sleep data on mobile wearing Garmin sleep tracking armband on right arm (bottom right).
How we test sleep trackers

By Eve Davies Published

A guide to how we test, review and rate sleep trackers for our shopping guides and why you can trust our recommendations

Sleep Tech
An image showing behind the scenes of our temperature regulation tests on the Saatva Classic mattress, with our tester lying on the mattress and our Managing Editor of Sleep, Claire Davies' iPhone attached to our thermal imaging camera to track the heat absorption and heat dissipation capabilities of the Saatva Classic over a period of 30 minutes.
Our thermal tests show this specific type of mattress helps you sleep cooler than any other — here's exactly what to look for

By Eve Davies Published

Our new and improved mattress testing data shows hybrid mattresses are the best at keeping you cool at night. Here's how they do it and what hot sleepers should look for when bed shopping.

Mattresses
Image is split into four squares, with each square showing a different aspect of our mattress testing process. In the top left hand corner one of our mattress writers performs an effective sleep space test on the DreamCloud Classic mattress. In the top right hand corner you can see our pressure relief weighted indentation test in process, where we are using a standardized stack of weights to measure how much the mattress indents (how well it contours) and how quickly it recovers (how responsive it is). In the bottom left hand corner another our of mattress testers lies on her side on the Saatva Classic mattress during a pressure relief test, with a digital laser projecting a straight line onto her back so we can assess how well the mattress supports spinal alignment. In the bottom right hand corner, one of our mattress testers lies on a hybrid mattress during a thermal regulation test. In the image you can see we're using a thermal imaging camera to measure how much heat the mattress absorbs and how quickly it dissipates that heat.
How we test mattresses

By Claire Davies Published

A complete guide to our new methodology and scoring system

Mattresses
A close-up shot of the white and blue cooling gel-foam used in mattresses
What is gel-foam in mattresses?

By Frances Daniels Last updated

Gel-foam mattresses are different to pure memory foam mattresses — here’s what you should know and whether you should buy one.

Mattresses
What is Amazon Prime
What is Amazon Prime? Everything you need to know

By Louis Ramirez Last updated

Amazon Prime is more than fast shipping. If you're wondering what is Amazon Prime — here's what you need to know.

Tech
Our mattress tester wearing black silk pyjamas laying on her back on the Birch Elite mattress on wooden bedframe in warm lit bedroom with bedside plant, chair, unit, lamp and checkred rug
What is pressure relief in a mattress?

By Frances Daniels Published

Pressure relief is a key factor when choosing a mattress for you. But what exactly is it? Find out more here..

Mattresses
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