Tech
Stay Warm in the Lodge or Half-Pipe with the Best Ski Clothes
Honorable Mentions
During the winter, a whole WIRED crew tests ski clothes almost constantly. Here are a few other items that we like.
Courtesy of REI
Hestra Fall Line 3-Finger Gloves for $190: I’ve long admired Hestra gloves from across the lift line, impressed by the Swedish company’s elegant stitchwork and thoughtful design touches. This was the year I finally got to try a pair for myself, and the Fall Line are exactly what they look like. There are six sizes available so you can get the perfect fit in this glove. The cowhide is buttery smooth and has already broken in a bit with five days’ use. The wrist strap means you never have to fret about dropping your glove from the lift when checking your phone, and they’re very warm without making me sweat. If you do sweat, the lining is removable so you can wash it without damaging the leather. —Martin Cizmar
Courtesy of Crab Grab
Crab Grab Snuggler Mitts for $89: These mini sleeping bags for your fingers are packed full of Primaloft insulation and benefitting from a sherpa fleece lining, they are toasty warm, and with a 15K membrane, impressively waterproof too. All-season mittens with durable construction for under $100? Yes Please!
Courtesy of Mons Royale
Mons Royale Yotei Merino Classic Long Sleeve for $98: As I type this, I’m nowhere near a mountain, but I’m still wearing the Mons Royale Yotei long sleeve top. It is ridiculously comfortable, made from 190-gsm-weight, 100 percent merino wool, and has a mercifully relaxed cut, so I remain warm, but don’t feel like a sausage. On the mountain however, the merino wool works its magic, wicking away sweat—especially on a hike up to some fresh powder—and keeping me comfortable. Paired with a shell and the Patagonia R1 Thermal Hoodie, I’m warm enough during a bitter arctic blast.
Seniq Powder Puff Down Jacket for $498 and Bib for $398: Seniq is another all-women’s outdoor brand that launched in 2024. It’s styled a little more Gen Z, leaning into fun color blocking over the monochromatic look. The Seniq Powder Puff Down Jacket has a dry-touch finish. It’s meant for drier days on the mountain, but a PFC-free DWR coating and YKK AquaGuard zippers do provide water resistance. The asymmetric front zipper helps you avoid chin rub when you have the jacket fully zipped. It also features cool asymmetrical quilting lines, side pockets-in-pockets that provide access to your bib (their bibs have a pocket on the front, so you can get in there without unzipping your jacket), an oversized removable hood, a forearm pass pocket, soft and stretchy wrist gaiters, and a large internal pocket that can absolutely handle a sandwich. This jacket was warm, pillowy, and comforting, like a super-soft hug.
The silky shell bibs are slightly barrel cut, which gives them a flattering shape without being fitted. The adjustable racer back-style straps and low back (with a stretchy waist) also provide a nice shape and breathability. There are two pockets on the front chest, pockets on either leg, two-way zip thigh vents, and a butt zipper for bathroom breaks. These fit easily over my boots, and the instep guards were a nice touch. With a durable three-layer membrane and a 20,000-mm waterproof rating, these will hold up against any and all weather the mountain throws at you. When I wore them on a wet snowy day, they beaded and sloughed off moisture well. —Kristin Canning
Mammut Sender In Hooded Jacket for $259: This puffy hoodie is a great mid-layer for under a shell jacket. The insulation is made from recycled rope scraps, and the outer is coated in wind-resistant PFC-free DWR coating. The hem falls at the hips, and the high collar and tight hood keep most of the face covered. I like wearing this piece under shells for snowboarding, but I know it’ll pull double duty as a comfy hiking and camping jacket, too, so it’s a solid multipurpose investment. It’s exceptionally lightweight and warm, though from a volume standpoint, it is on the bulkier side for a mid-layer and isn’t the most packable piece. —Kristin Canning
Helly Hansen Evolved Air Half Zip for $112: This fleece pullover has a waffle-like texture that traps heat and wicks moisture. With a high zippered collar and cinchable hem, you can adjust the fit to make it more air-tight or breathable. This mid-layer felt wonderfully lightweight while still keeping my toasty. It’s not bulky at all, only a little thicker than a base layer, laid comfortably under my jackets, and moved with me on the mountain. —Kristin Canning
Helly Hansen Lifa Base Layer Long-Sleeve Crew for $115 and Pants for $115: These base layers hit the weight sweet spot; they’re not too thick or thin, but just right. They’re slightly looser than other options on this list, so if you prefer something that isn’t so fitted, these are a great pick (but note that they run long too). These combine merino wool with Helly Hansen’s LIFA fibers, which add more moisture-wicking capabilities. They’re soft, lightweight, warm, and don’t hold onto smells. I love the cute designs and how well they regulate my temperature under insulated jackets and pants. The waist digs in a bit but doesn’t roll, and they stay in place and move well. —Kristin Canning
We have a full guide on how to layer, but here are your essentials.
Base layer: A good set of thermals is essential in the fight against cold, especially when you’re working hard. The best fabrics wick away sweat as you heat up, which helps regulate your temperature. Merino wool is the best at this, but also the most expensive. Synthetic fabrics are getting better, though, and please avoid cotton at all costs, as it gets wet and stays that way, making you cold and uncomfortable.
Mid layer: Whether you choose a hooded fleece or puffer-style jacket, this layer does the bulk of the work in cold conditions. Combined with the base layer, it traps warm air in, while also allowing moisture to be expelled. Synthetic insulation such as Primaloft Gold is brilliant and doesn’t lose its properties if it gets wet. Down jackets offer the best warmth-to-weight ratio, but they don’t pack down as small, and should never get wet. A fleece with an insulated vest is a great option if you really feel the cold.
Jacket: While ski jackets with insulation offer bonus warmth in Arctic-like conditions, for most people a waterproof shell will be enough, as it offers protection from both the snow and the wind. A cold wind will chill you to your bones faster than a bit of wet snow. Ideally choose a jacket with a waterproof membrane such as Gore-Tex (make sure it is free from PFAS, or forever chemicals), but also check for taped seams for added waterproofing, plus plenty of pockets for snacks and lift passes, and wrist cuffs and ski skirts to help keep out the snow.
Socks: As with your base layer, socks keep you warm and maintain your temperature when you’re building up a sweat. Natural fabrics work well, but a blend of merino wool with synthetic stretchy fibers is the way to go, as they stay up better and can be used for more than a day. Avoid cotton again, and never wear two pairs, as you’ll almost certainly get colder feet.
Gloves: You’ll be surprised by how wet ski gloves get when it’s snowing, even if you don’t fall very often. As a result, waterproof options work best in most cases, although well-made leather designs can be almost as waterproof as a pair with Gore-Tex. Mittens are generally warmer than gloves, but what you gain in toasty fingers you lose in dexterity. Check out our Best Ski Gloves and Mittens guide for more information.
Waterproofing and breathability ratings: Waterproofing is measured with a hydrostatic head rating, or HH. That means if you put a 1-inch, endlessly long square tube on top of the fabric, you could pour 20,000 millimeters of water before it would seep through. Breathability is rated in how many grams of vapor per square meter can can pass through the fabric in 24 hours.
I’ve been reviewing winter sports gear for more than 15 years. In that time, I have worn an untold number of jackets, pants, mid-layers, thermals, gloves, and mittens. I called on industry experts and professional skiers, and solicited opinions from fellow winter sport enthusiasts on the WIRED team. While a basic fit check can be done in the office, nothing replaces on-mountain testing in variable conditions. We put in the time on various trips to the French Alps, as well as in resorts in Vermont, Colorado, Arizona, and Oregon.
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Tech
‘The Last Airbender’ Leaked Online. Some Fans Say Paramount Deserves the Fallout
The online leak of a full version of Avatar: Aang, The Last Airbender—a highly anticipated animated film in a multimedia fantasy franchise—has divided passionate fans while upsetting those who spent years working on the film.
The leaks began on X late on Saturday night, about six months before Aang was scheduled to premiere on Paramount+. User @ImStillDissin posted two short clips from the film. “Nickelodeon accidentally emailed me the entire Avatar aang movie,” he claimed. He also threatened to stream the entire movie if Paramount didn’t release an official trailer, and he posted a still from the movie’s end credits, revealing previously undisclosed voice-over cast and roles. The media from @ImStillDissin’s posts were later hit with copyright strikes and removed.
But within 48 hours, links to download the full movie appeared on 4chan and X, where some users also directly streamed the film. Across the web, fans said they had successfully pirated and watched what appeared to be a nearly finished and “beautiful” animated film.
While some argued that Paramount deserved to be punished because of certain creative and marketing decisions around the movie, others noted what a blow the leak was to the animators and production crew. A number of those team members took to social media to convey their sadness and frustration.
“We worked on the aang movie for years with the expectation that’d [sic] we’d get to celebrate all of our hard work in theaters. Just to see people unceremoniously leak the film and pass our shots around on twitter like candy,” animator Julia Schoel wrote Tuesday on X.
The user behind @ImStillDissin, who would not reveal his real name due to fear of legal repercussions, tells WIRED that he obtained the movie almost by chance and did not expect his posts to set off such a crisis in the entertainment world. “When I posted those clips I was purely trolling,” he says. “I was expecting a day of clout farming at best, not for the whole thing to blow up like this.”
(While WIRED has done its due diligence in verifying that the person speaking to us was behind the @ImStillDissin X account, we acknowledge that the hacking community is known to troll.)
According to @ImStillDissin, a screen-grabbed version of Avatar: Aang, The Last Airbender was circulating among people he knew from his days in the hacking community, one of whom shared it with him. “Broadly speaking, the supply chain for movies and TV is rife with insecure companies and vendors and lax checks,” he claims. He notes that two different SpongeBob SquarePants movies leaked months before their release dates in 2024. “Someone on 4chan who wasn’t happy at me drip-feeding stuff posted a copy of a draft script [of the new Avatar film] from like two years back,” says @ImStillDissin.
Neither Nickelodeon nor its parent company Paramount have confirmed a hack had taken place, nor have they issued a statement on the matter. They also did not respond to requests for comment.
Originally announced in 2021, Avatar: Aang, The Last Airbender marked the first production for Avatar Studios, a division of Nickelodeon’s animation department.
Some people felt justified in pirating and sharing the movie due to the recasting of voice actors. Last year, during a Reddit AMA, casting director Jenny Jue wrote that the voice cast from the Avatar TV show that aired on Nickelodeon in the 2000s was not returning due to efforts to “match actors’ ethnic/racial background to the characters they’re portraying.”
Tech
NASA Wants to Put Nuclear Reactors on the Moon
Having demonstrated that it has the operational capability to transport humans safely to the moon and back, the United States is moving on to its next major aim: It wants nuclear reactors in orbit and on the lunar surface by 2030. For such a feat, the National Aeronautics and Space Administration will have to work in conjunction with the Department of Defense and the Department of Energy.
In a post on X, the White House Office of Science and Technology Policy (OSTP) unveiled a document with new guidelines for federal agencies to establish the space nuclear technology road map for the coming years. This, they say, will ensure “US space superiority.”
At present, space instruments use solar power to operate. However, this is considered impractical for more complex purposes. Although technically there is always sunlight, the power is intermittent and almost always requires bulky batteries to store it.
Reactors produce fairly continuous energy for years through nuclear fission. They can also be used for so-called nuclear electric propulsion. Continuous output makes them the most viable option for lunar base subsistence, but they can also allow spacecraft to undertake long or complex missions without worrying about depleting a limited supply of chemical fuel.
Nuclear technology, in short, makes it possible to go farther, with more payload, for longer, and with fewer constraints.
According to the memorandum, the US goal is to put a medium-power reactor in orbit by 2028, with a variant designed for nuclear electric propulsion, and a first functional large reactor on the surface of the moon by 2030. To achieve this, both NASA and the Pentagon will develop energy technologies in parallel, using the current strategy of competition among contractors.
The reactors will have to be modular and scalable, and will have to include applications for both future life on the moon and space propulsion. For its part, the DOE will have to ensure that these projects have the fuel, infrastructure, and safety features necessary to achieve their objectives. In addition, the agency will evaluate whether the industry has the capacity to produce up to four reactors in five years.
The plan contemplates technologies that produce at least 20 kilowatts of electricity (kWe) for three years in orbit and at least five years on the lunar surface. In the meantime, they should have a design capable of raising power to 100 kWe. The first designs should arrive within a year.
Finally, the order tasks the OSTP with creating a road map for the initiative, noting obstacles and recommendations for addressing them.
“Nuclear power in space will give us the sustained electricity, heating, and propulsion essential to a permanent presence on the moon, Mars, and beyond,” OSTP posted. For his part, NASA administrator Jared Isaacman posted, “The time has come for America to get underway on nuclear power in space.” The message was followed by an emoji of a US flag.
The plan provides a common framework for each agency to work within. In the background, the race for space infrastructure is evidence of technological competition with China, which is also seeking advanced energy capabilities for the moon.
This story originally appeared in WIRED en Español and has been translated from Spanish.
Tech
AI Could Democratize One of Tech’s Most Valuable Resources
Nvidia is the undisputed king of AI chips. But thanks to the AI it helped build, the champ could soon face growing competition.
Modern AI runs on Nvidia designs, a dynamic that has propelled the company to a market cap of well over $4 trillion. Each new generation of Nvidia chip allows companies to train more powerful AI models using hundreds or thousands of processors networked together inside vast data centers. One reason for Nvidia’s success is that it provides software to help program each new generation of chip. That may soon not be such a differentiated skill.
A startup called Wafer is training AI models to do one of the most difficult and important jobs in AI—optimizing code so that it runs as efficiently as possible on a particular silicon chip.
Emilio Andere, cofounder and CEO of Wafer, says the company performs reinforcement learning on open source models to teach them to write kernel code, or software that interacts directly with hardware in an operating system. Andere says Wafer also adds “agentic harnesses” to existing coding models like Anthropic’s Claude and OpenAI’s GPT to soup up their ability to write code that runs directly on chips.
Many prominent tech companies now have their own chips. Apple and others have for years used custom silicon to improve the performance and the efficiency of software running on laptops, tablets, and smartphones. At the other end of the scale, companies like Google and Amazon mint their own silicon to improve the performance of their cloud-computing platforms. Meta recently said it would deploy 1 gigawatt of compute capacity with a new chip developed with Broadcom. Deploying custom silicon also involves writing a lot of code so that it runs smoothly and efficiently on the new processor.
Wafer is working with companies including AMD and Amazon to help optimize software to run efficiently on their hardware. The startup has so far raised $4 million in seed funding from Google’s Jeff Dean, Wojciech Zaremba of OpenAI, and others.
Andere believes that his company’s AI-led approach has the potential to challenge Nvidia’s dominance. A number of high-end chips now offer similar raw floating point performance—a key industry benchmark of a chip’s ability to perform simple calculations—to Nvidia’s best silicon.
“The best AMD hardware, the best [Amazon] Trainium hardware, the best [Google] TPUs, give you the same theoretical flops to Nvidia GPUs,” Andere told me recently. “We want to maximize intelligence per watt.”
Performance engineers with the skill needed to optimize code to run reliably and efficiently on these chips are expensive and in high demand, Andere says, while Nvidia’s software ecosystem makes it easier to write and maintain code for its chips. That makes it hard for even the biggest tech companies to go it alone.
When Anthropic partnered with Amazon to build its AI models on Trainium, for instance, it had to rewrite its model’s code from scratch to make it run as efficiently as possible on the hardware, Andere says.
Of course, Anthropic’s Claude is now one of many AI models that are now superhuman at writing code. So Andere reckons it may not be long before AI starts consuming Nvidia software advantage.
“The moat lives in the programmability of the chip,” Andere says in reference to the libraries and software tools that make it easier to optimize code for Nvidia hardware. “I think it’s time to start rethinking whether that’s actually a strong moat.”
Besides making it easier to optimize code for different silicon, AI may soon make it easier to design chips themselves. Ricursive Intelligence, a startup founded by two ex-Google engineers, Azalia Mirhoseini and Anna Goldie, is developing new ways to design computer chips with artificial intelligence. If its technology takes off, a lot more companies could branch into chip design, creating custom silicon that runs their software more efficiently.
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