Tech
Night Sweats, Be Gone! Here Are the Best WIRED-Tested Cooling Mattresses
Honorable Mentions
There are a ton of mattresses and related items on the market that claim to have cooling benefits. Here are a few others we tested and liked, but not as much as the options above.
BedJet 3 for $427: WIRED reviewer Christopher Null liked this climate-control device a lot because it allowed him to sleep cool without having to buy a whole new mattress. This device uses a large blower under your bed to blast hot or cool air beneath your covers. If you like your existing mattress but find yourself sleeping hot, this could be just the ticket.
Courtesy of Sealy
Sealy Cocoon Chill Memory Foam Mattress for $919: Its surface is noticeably cool to the touch thanks to its exclusive phase change material, which works wonders at drawing and storing the body’s heat. This all-foam mattress leans firm, making it well-suited for back and stomach sleepers. If you’re a side sleeper looking for more body contouring, I’d suggest looking elsewhere. If you’re a stomach sleeper looking for a firm mattress that’s also cooling, this one will do the trick. There was almost no motion transfer in my testing, allowing my husband and me to get up at different times without disturbing each other. —Nicole Kinning
Casper Snow Hybrid for $2,595: When you come across a mattress with a name that includes “snow,” your expectations for cooling effects are naturally high—and this mattress indeed lives up to that expectation. Structurally, this hybrid bed combines poly foam, memory foam, and pocketed coils, and provides targeted support at the hips, waist, and lower back to alleviate pressure, making it ideal for back and stomach sleepers. I noticed it came out of the box slightly misshapen from its packaging and emitted a faint plasticky scent. After about two days, the mattress was ready to go, the smell gone, and it had settled into its intended neat rectangle shape. —Nicole Kinning
Saatva Memory Foam Hybrid for $2,049: The Saatva Memory Foam Hybrid is marketed as firm, and that’s exactly what you should expect. Crafted with patented AirCradle memory foam, the mattress features concentrated cushioning in the center, strategically intended to support your lower back. Since I’m only 5’2,” the middle-back cushioning didn’t hit where it was intended to. Despite its firmness, I didn’t find this mattress particularly exceptional, especially with its cooling properties. Despite incorporating a triple-phase LuxeCool system and cooling gel-infused memory foam, the cooling effect didn’t stand out. —Nicole Kinning
Courtesy of Wayfair
Wayfair Sleep 12-Inch Medium Cooling Gel Memory Foam Mattress for $500: This bed has four layers of hypoallergenic gel memory foam infused with green tea, using cooling technology and a breathable design to ensure you’re having a super-cool sleep. This medium-plush bed has two top layers of gel-infused memory and comfort foam to help with breathability and cooling, and the top material is a breathable knitted cover to aid in airflow circulation. This mattress had the perfect balance of soft cooling with the memory foam, and the breathable knitted cover also helped with airflow. Most importantly, though, I always slept coolly on this sleeper hit (pun intended).
Wayfair 10.5-Inch Plush Cooling Gel Mattress for $536 (King): This cooling gel hybrid mattress comprises five layers of various memory foams. The memory foam pillow top aims to relieve pressure points and help reduce motion transfer, and it has a breathable knit cover to aid in the cooling effect. The mattress is compatible with an adjustable base and has a 100-night trial and 10-year warranty. Although it doesn’t have as noticeable a cooling effect as some others on this list, it’s a true plush mattress that uses cooling gel technology at an affordable price.
Wayfair Sleep 8-Inch Medium Cooling Gel Memory Foam for $400: This super-cheap medium-firm cooling mattress has eight total inches of memory foam—the top layer of cooling gel, charcoal, and green tea-infused memory foams (to aid in freshness and odor absorption), followed by a soft comfort foam on a durable high-density foam base. The top layer has a breathable, woven jacquard design that helps to keep the sleeper cool and reduces motion transfer. The layers of ultra-cooling gel and green tea-infused memory foams help with the cooling effect and keep any odors at bay. This super-inexpensive mattress delivers well above expectations, but there are better cooling options on our list.
Wayfair Sleep 14-Inch Plush Cooling Gel Hybrid Mattress for $326 (Full): This plush cooling gel mattress features a top plush layer of gel memory foam to relieve pressure and help with airflow, plus the quilted Euro-top knit cover and sides promote continuous airflow around the mattress to keep the sleeper cool. The bed also features classic pocket coils below for structure and support, with layers of memory foams surrounding the coils (this helps with low-motion transfer, too). The mattress is also compatible with an adjustable bed base, has solid edge support, offers a 100-night trial, and has a 10-year warranty. I love a plush mattress, but it may be too plush for someone with a bigger body, since the first super-soft memory foam layer is on top of a coil system.
Wayfair Sleep 13.5-Inch Medium Cooling Gel Memory Foam Mattress for $550: This 13.5-inch cooling gel memory foam mattress is listed as medium, but I’d definitely consider it super-plush. The top layer has 2 inches of gel-infused memory foam and 4.5 inches of comfort foam, and the bottom layer is 7 inches of high-density base support foam. Like other cooling Wayfair mattresses, the top has a breathable jacquard pattern and is green tea-infused to help with freshness and cooling. The top layers of memory foam are designed to mold to your body and help relieve pains and achy joints. This in-a-box bed also has low-motion transfer, a 100-night trial, and a limited 10-year warranty. If you’re someone who wants a super-plush bed that helps to wick moisture, then I’d recommend this behemoth.
Compare the Best Cooling Mattresses
How Does WIRED Test Cooling Mattresses?
Mattresses are tested for at least a week, but in many cases for longer. I slept on the majority of these mattresses for half a month or more to really get a feel for the product. I tested them at different times of the season and with different types of sheets and bedding. I sat on the edges to test for edge support, jumped, and performed some other methods to test the bounce and motion transfer of the mattress. Perhaps most important for this guide, I was my normal, perpetually warm (and sweaty) self, and gauged more abstract things like my overall comfort at night, and how well I thought air flowed through the mattress, or how much heat was trapped in.
What Should You Look for in a Cooling Mattress?
When shopping for a cooling mattress, here are a few things to consider:
- Composition: Opt for mattress materials designed to promote airflow, which will help prevent heat buildup. Many mattresses are infused with gel or copper, which are designed to dissipate heat and keep you cool. A hybrid mattress combines the best of both worlds by using a coil support system under a foam, latex, or polyfoam comfort top. Hybrid mattresses tend to retain less heat than all-foam mattresses because they have a layer or two of springs to help dissipate heat.
- Cover fabric: Consider mattresses with covers made from moisture-wicking fabrics and phase-change fibers to draw sweat away from the body. Breathable fabrics include bamboo, Tencel lyocell, and synthetic fabrics, which are engineered to help regulate body temperature. Perforated cooling covers further amplify airflow between your body and the fabric. We find quilted tops help too, since they have ridges and valleys that allow air to escape.
- Airflow: With proper airflow, the heat you generate overnight is properly conducted through the mattress. Hybrid mattresses with individual coils help with this, but many mattresses marketed for their cooling benefits have other tricks.
- Firmness: While the debate of soft versus firm mattresses is a personal preference, your choice can play a crucial role in the way your body traps heat. Softer mattresses tend to envelop your body, leading to increased heat retention as your body sinks into the surface. Conversely, firmer mattresses provide better support and allow for more air circulation around your body.
How Did WIRED Select Models to Be Reviewed?
We have tested over 100 mattresses across all of our guides, like Best Organic Mattresses, Best Mattresses for Back Pain, and Best Mattresses You Can Buy Online, as well as for individual review. We talk with each other, discussing which mattress brands in general we’re fans of, and which we aren’t. Some mattresses are provided as review samples by the manufacturers, with the understanding that we don’t guarantee coverage or type of coverage—we aren’t paid for glowing reviews on products we think are just mid. We purchase and expense models we aren’t able to get a sample of.
We try to test a range of mattress types, firmness, and brands to ensure we know what’s out on the market, so we can best give you our honest, unbiased opinion on which mattresses you should spend your money (and one-third of your life sleeping) on.
What Does WIRED Do With Mattresses After Testing?
We keep top picks for longer-term durability testing in our own homes and the homes of other staffers, friends, and family members, while other models are donated locally.
Power up with unlimited access to WIRED. Get best-in-class reporting and exclusive subscriber content that’s too important to ignore. Subscribe Today.
Tech
What It’s Like to Have a Brain Implant for 5 Years
Initially, Gorham used his brain-computer interface for single clicks, Oxley says. Then he moved on to multi-clicks and eventually sliding control, which is akin to turning up a volume knob. Now he can move a computer cursor, an example of 2D control—horizontal and vertical movements within a two-dimensional plane.
Over the years, Gorham has gotten to try out different devices using his implant. Zafar Faraz, a field clinical engineer for Synchron, says Gorham directly contributed to the development of Switch Control, a new accessibility feature Apple announced last year that allows brain-computer interface users the ability to control iPhones, iPads, and the Vision Pro with their thoughts.
In a video demonstration shown at an Nvidia conference last year in San Jose, California, Gorham demonstrates using his implant to play music from a smart speaker, turn on a fan, adjust his lights, activate an automatic pet feeder, and run a robotic vacuum in his home in Melbourne, Australia.
“Rodney has been pushing the boundaries of what is possible,” Faraz says.
As a field clinical engineer, Faraz visits Gorham in his home twice a week to lead sessions on his brain-computer interface. It’s Faraz’s job to monitor the performance of the device, troubleshoot problems, and also learn the range of things that Gorham can and can’t do with it. Synchron relies on this data to improve the reliability and user-friendliness of its system.
In the years he’s been working with Gorham, the two have done a lot of experimenting to see what’s possible with the implant. Once, Faraz says, he had Gorham using two iPads side by side, switching between playing a game on one and listening to music on the other. Another time, Gorham played a computer game in which he had to grab blocks on a shelf. The game was tied to an actual robotic arm at the University of Melbourne, about six miles from Gorham’s home, that remotely moved real blocks in a lab.
Gorham, who was an IBM software salesman before he was diagnosed with ALS in 2016, has relished being such a key part of the development of the technology, his wife Caroline says.
“It fits Rodney’s set of life skills,” she says. “He spent 30 years in IT, talking to customers, finding out what they needed from their software, and then going back to the techos to actually develop what the customer needed. Now it’s sort of flipped around the other way.” After a session with Faraz, Gorham will often be smiling ear to ear.
Through field visits, the Synchron team realized it needed to change the setup of its system. Currently, a wire cable with a paddle on one end needs to sit on top of the user’s chest. The paddle collects the brain signals that are beamed through the chest and transmits them via the wire to an external unit that translates those signals into commands. In its second generation system, Synchron is removing that wire.
“If you have a wearable component where there’s a delicate communication layer, we learned that that’s a problem,” Oxley says. “With a paralyzed population, you have to depend on someone to come and modify the wearable components and make sure the link is working. That was a huge learning piece for us.”
Tech
Barkbox Offers: Themed Dog Toys, All-Natural Treats, and Subscription Deals
As my fellow pet parents will know, it’s amazing how quickly even the tiniest of dogs can demolish their toys and treat stash. We love and spoil them nonetheless. When you subscribe to BarkBox a fresh batch of cleverly themed treats and toys arrives at your doorstep. The costs of pet ownership can stack up quickly, especially if you’re buying your pooch a random gift box that goes well beyond the essentials. That’s why we have Barkbox promo codes and discount options ready to go for you.
Barkbox Promo: Enjoy a Free Toy for a Year at Barkbox
When your monthly Barkbox arrives, it’s like Christmas morning for your dogs. I watch as my two dogs, Rosi and Randy, shake their little Chihuahua mix bodies with barely restrained excitement. They’re never gentle on their toys but the stimulation that comes from textures and chewing is good for their little brains. With Barkbox you get a steady supply of two unique toys and two bags of all-natural treats every month. If you want to see how your dogs react, this Barkbox coupon is good for new Barkbox subscription customers and adds an additional toy in your box every month for a year.
Save 50% on Your First Barkbox Food Subscription With a Barkbox Coupon Code
Another reason why Barkbox is the best dog subscription box is how easy the company makes it to keep your pantry stocked with your dog’s food. Use this Barkbox coupon to save 50% off your first Barkbox food subscription, so you won’t have to end up running out to the grocery store in the middle of the night when your scooper scrapes across the bottom of an empty kibble bin.
Fly Travel Stress-Free With Your Dog and Get $300 Off BARK Air Flights
If you live in a Barkbox flight hub destination, please know I am insanely jealous of you. It’s no secret that flying is stressful and can be very dangerous for pets, especially if they have to ride in a cargo hold. Barkbox makes them the VIP with BARK Air, letting them ride in the cabin with you and get doted on, so things are a lot less scary. This is another perk of having a BarkBox subscription, with the opportunity to save $300 off BARK Air Flights.
Support Your Dog’s Dental Health and Get $10 Off With a Barkbox Coupon
Dental health is crucial for dogs, as it can prevent disease not just in their mouths, but their vital organs. Don’t forget to schedule your yearly cleaning with your vet, but in the meantime, use this BarkBox discount code to get $10 off a special BarkBox Dental kit.
Get an Extra Premium Toy in Every BarkBox With the Extra Toy Club
For having such tiny mouths, my dogs can gnaw through toys with surprising speed. If you’re also buried in a pile of shredded fluff and squeakers from disemboweled toys, the Extra Toy Club can help. This subscription includes dog toys for aggressive chewers of all ages, breeds, and sizes, offering extra durable toys meant to last longer. So far, so good at my house. To upgrade to this subscription box, it’s an extra $9 per month.
Get Exclusive BarkBox Discounts: Join the Email List
If you assume that the punchy branding and witty lingo extend to Barkbox’s email subscribers and not just the box subscription, you’d be correct. As a bonus, you can get exclusive BarkBox discount codes when you sign up to receive these emails. Who also doesn’t love a furry face and reminder of their pet in between work subject lines and bill payment reminders, too?
Tech
Transnational AI regulation needed to protect human rights in the UK | Computer Weekly
The transnational nature of artificial intelligence (AI) means international regulation is essential to tackle the safety issues associated with advanced AI, according to tech chiefs.
In the final evidence session of the Joint Committee on Human Rights inquiry into human rights and the regulation of AI on 25 February, MPs and Lords pressed the AI minister and senior executives from Meta and Microsoft on the adequacy of current safeguards in protecting fundamental rights.
Lawmakers questioned the panel on misinformation, accountability, child safety, existential risk and Britain’s AI sovereignty, probing whether current safeguards are strong enough to protect democratic rights and freedoms as AI systems become embedded across society.
The session came just weeks after the committee warned that the UK’s existing regulatory framework is struggling to keep pace with AI harms – with several regulators telling MPs that a lack of resources, rather than statutory powers, is the greatest hurdle to effective oversight.
Ginny Badanes, general manager of tech for society at Microsoft, and Rob Sherman, deputy chief privacy officer of policy at Meta, welcomed greater harmonisation in regulatory standards at a global level.
Speaking on AI governance, Badanes told MPs the current issue is not a lack of activity, but the bigger challenge of fragmentation.
“I worry at times when we have this variety of approaches that we’re not actually addressing the broader safety or human rights risks that are at the centre of what everyone is trying collectively to solve,” she said.
Transnational by design
Badanes added that “everything about advanced AI is transnational by design – the systems are developed, tested and deployed in a variety of places across borders and within multiple supply chains, and then integrated into products that are used at a global scale”.
She argued that an alignment in international standards could lead to a base layer of agreement, “creating a strong place to get out of fragmented models”.
Sherman mirrored this, noting that Meta operates in most countries worldwide, and that its human rights policy applies globally.
He added that Meta does not build separate AI models for different countries, despite the regional variation in AI governance.
Asked whether the UK’s AI Opportunities Action Plan strikes the right balance between innovation and human rights, both companies were broadly supportive.
Badanes said the UK had made “a sensible start”, building on its “strong foundation of human rights” law and taking a risk-based approach.
Public trust, she argued, is “absolutely critical” to AI adoption. “People will not embrace and use a technology that they do not trust,” said Badanes, adding that strong but proportionate regulation would help secure that trust.
Sherman described the UK’s strategy as “a really thoughtful and sensible approach”, and, in some respects, “a global model”. He also praised the UK’s AI Security Institute as “a global thought leader” in technical AI governance.
Misinformation and democracy
The committee asked if Meta was doing enough to challenge the use of AI by foreign actors on social media, raising concerns about how AI and social media are being used to undermine democratic rights and freedoms.
The committee noted that anonymous posting is increasingly the main way people post on Facebook groups.
Sherman stressed that Facebook is a “real identity platform”, meaning identity is verified using government-issued photo IDs, and that these groups were intended to allow people to share sensitive information without attaching their identity to it. Without accounting for the platform’s own role in spreading misinformation, he said, “I would encourage people to be thoughtful about the sources of the information that they consume”.
However, Sherman said the company would “certainly never suggest that the work to do that is done”, noting that adversaries “continue to evolve their tactics” and “behave adversarially”.
On the reliability of large language models, executives admitted AI systems can generate false information – so-called “hallucinations”. While models are “designed to tell you the truth”, Sherman conceded they are not 100% accurate.
Badanes added: “I think it’s incredibly difficult to ask a large language model to consistently provide you with the truth, in part because of the inherent flaws of the way the systems are designed. I do expect they will continue to get better, but also because truth is at times subjective, and it is a challenging environment to guarantee or ensure anything.”
The committee asked about situations when chatbots provide incorrect or manipulative outputs. Badanes noted the importance of public trust in AI, saying it is lost when the system does not answer a question.
The witnesses said Facebook and Microsoft are working to improve factual alignment, provide citations and, in some cases, indicate levels of confidence in responses. They also emphasised the importance of AI literacy and managing expectations of what services chatbots should provide.
The most difficult questions centred on accountability. When asked who should be responsible if someone suffers harm after relying on incorrect or manipulative AI outputs, such as bad legal advice or encouragement of self-harm, executives stopped short of proposing a specific legal framework.
Microsoft’s Badanes said accountability should attach “where there’s meaningful control”, suggesting responsibility may vary depending on whether harm stems from the model itself, its deployment, or a malicious user. Meta’s Sherman agreed courts would likely need to examine “multiple players” in any given case.
Parental controls
Sherman highlighted that age verification often varies app to app, and highlighted that standardised, platform-level verification is not in the current ecosystem, but would be valuable.
Badanes emphasised the variation in experiences of AI across platforms. “A chatbox where a child can form relationships is going to be a higher-risk scenario than potentially a tutoring app,” she said, encouraging a risk-based approach to AI governance rather than attempting to apply a single age-based threshold across AI tools.
“It’s not just about restricting access, we also need to build these age-appropriate designs and safety guardrails – it’s about adding clear boundaries into the system from the very beginning,” said Badanes.
Existential risks from AI
Asked if individuals should be able to opt out of AI entirely, Sherman said AI has been embedded in services such as Facebook and Instagram “since the beginning”, from news feed ranking to spam filtering. “I don’t think that opting out of AI as a technology is probably realistic,” he said, warning against the idea that it would be possible to “wall off AI from the rest of technology”.
Sherman and Badanes pushed back against binary artificial general intelligence narratives, such as the 2023 extinction-risk statement from the Centre for AI Safety, signed by many leaders in the tech industry, that warned of possible risks of extinction from AI.
Sherman said: “I think the reality is maybe a little bit less exciting and a little bit more mundane, which is that the technology will continue to improve iteratively. I don’t think we’re in a situation where we’re going to wake up one day, and the world is vastly different.”
Badanes described existential harm as “low-probability, high-impact”, stressing that companies are focused on managing both long-term and immediate dangers. “We have to address the risks in the here and now,” said Sherman, while continuing to plan for more extreme scenarios.
Both firms pointed to internal governance structures, including red-teaming exercises, external expert consultation and frontier risk frameworks. Sherman told MPs that through the Frontier programme, Meta evaluates models for “chemical, biological, cyber security and autonomy risks” before and after deployment.
They also emphasised the importance of collaboration with governments, noting that states hold intelligence and national security information unavailable to the private sector.
Speaking to the committee in a separate session, AI minister Kanishka Narayan praised the UK’s AI Security Institute, saying it provides “unparalleled pre-deployment access” to advanced models and plays a key role in developing international evaluation standards.
Badanes likened AI to nuclear regulation. “There are a lot of really complicated challenges that we as a big, large society, have been able to resolve that have had similar roots,” she said.
However, MPs raised concerns about AI researchers who have left major companies over safety disagreements. Asked whether voluntary corporate safeguards were sufficient, Sherman responded that firms have “clear internal reporting mechanisms” and “encourage dissent”, but stopped short of calling for binding global treaties.
Industry leaders urged policymakers to prioritise “interoperable, risk-based global standards” for the most capable systems and invest in content provenance tools, including watermarking, to counter misinformation.
Narayan noted that compared with the first AI summit in Bletchley Park, the India AI Impact Summit was much more focused on the day-to-day experience of people rather than the more abstract, long-term questions of how AI might fundamentally transform the economy, or the more long-term risks it may pose.
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