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"So many groups jumped into the space, I think there could be some kind of race to the bottom in terms of pricing when there isn’t much differentiation," said Russ Whatcott, Purple’s director of innovation.

“We see [the home] as a place for ourselves, a place that represents us, who we will be in it and how we can care for it,” says Wang. “That’s why bedding has blown up and has merged with wellness in such a meaningful way.”

Front sleepers – again a pocket sprung mattress can work well for supporting you in all the right places, whereas with memory foam you might feel restrained. Latex can also work well as there’s more bounce-back.

Though the cabin was full, meaning there were eight passengers, there were three flight attendants working, so meal service took just over an hour. No sooner had I eaten a dish than the next was brought out from the galley.

When we surveyed Which? members to find out more about mattresses, those who own an open-coil mattress are less likely to say that it helps them to get a good night’s sleep than those who own other types of mattress.

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It used to be the case that a cheap mattress was a false economy, but we found that there are exceptions, such as the Ikea Morgedal, which costs just £125 for a single. That’s not to say that mattresses costing thousands of pounds aren’t worth it, though – just make sure to do your research first.

Mattress Firm has closed hundreds of stores over the last year and is said to be considering bankruptcy, according to Reuters. Among other issues, the company is grappling with the fallout from an intense competition with online bed-in-a-box rivals such as Casper and the consequences of heavy discounting.

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Springs suppliers say adding their products to a mattress makes it more compelling for the online shopper.

Charity and giving programs are another important feature of a responsible company. Returned mattresses cannot be resold, so every company has a donation program to dispose of returned mattresses responsibly. Shoppers also want to know that their spending is supporting ethical business practices, which often involve extensive charitable giving. With active giving ranging from 1% for the Planet to extensive networks of charitable programs supported by most of the mattress makers in our comparison, you can find a sustainable mattress that aligns with your values.

As a general rule, light and side sleepers should choose something that’s slightly softer while heavier back or front sleepers should go for the medium-firm or firm option.