The 10 Best Midlayers for Outdoor Adventures, Tested & Reviewed

The R1 has been beloved among Patagonia fans since it came out. Anyone I know who has one raves about it, and for good reason. The R1 Air is a newer version of the classic. The zig-zag knit pattern on the soft fleece might look like a stylistic choice, but it is designed to reduce bulk and improve airflow, and boy does it. The fabric is lightweight and quick-drying, but also surprisingly warm.

The R1 is good for just about any type of outing. The fit is described as regular, though I find it actually skews somewhat slim, without being restrictive. This allows it to operate seamlessly under a shell. Another Field Mag gear tester sized up from a medium to a large so he can wear it like a sweater in casual settings, in addition to using it for skiing and hiking.

At 278 grams, the crew version of the R1 Air falls in the middle of the pack as far as midlayer weight goes, making it a little heavy for activities like running. It doesn't provide as much insulation as thicker fleeces or a down jacket either though, so you may want to take a multi-layer approach for trips high above treeline that require maximizing warmth. For all the everyday experiences between, this is one to keep in your arsenal. And it comes at a nice price too.

The Vale is purpose built. The polyamide shell and PrimaLoft lining are highly breathable, as the expectation is that you'll be working up a sweat while wearing this jacket. Its features are designed for that—the Vale has high, fleece-lined pockets to stay out of the way of backpack hip belts or climbing harnesses, a helmet-compatible hood, integrated thumbholes, and a diagonal front zipper to avoid chin irritation while zipped up and on the move. The fit is slim enough to wear under a shell, but with enough room for a baselayer underneath.

These thoughtful touches were clearly dreamed up by designers who were frustrated with general purpose midlayers that lacked mountain-specific features. The Vale is perfect for backcountry skiing and mountaineering, though its unique design might be lost on day hikers looking for something more all-purpose. That specificity won’t really matter much to flatlanders or folks on casual outings.

The folks at Snow Peak tend to design apparel in line with their passions. They don’t pander to consumer trends, but continue to make gear and apparel that aligns with the activities that matter to the brand. Namely: camping and fishing.

The High Loft Crew was designed with fishing in mind. High-loft fibers are wonderful at trapping heat without taking up space: the air pockets do the work. This also helps the fabric thermoregulate. That's what makes it a good fit for a crewneck fleece—it can provide warmth while out on the water, fit under waders, and dry quickly.

The fit on the High Loft is somewhat roomier than other fleece midlayers—that's typical for Snow Peak apparel—and it's the heaviest layer on this list. But it wasn’t intended to be worn while engaging in hard-charging activities in the mountains like running and ski touring. You probably won't be carrying it too far, so the extra bulk is worth the extra warmth.

Will it still work for other pursuits? Absolutely. For everyday uses like bike commuting and light hikes, we think it’s an excellent option, and with Snow Peak's usual understated style, there may be no better après-adventure layer on the list.

Made for running, the Ciele VLVHalfzip features a diamond grid fleece fabric that creates pockets of air for insulation, similar to materials like Octa and Alpha Direct. The fabric is highly technical but it's also soft and cozy. The exterior, meanwhile, features reflective detailing, thumb loops, and pockets for holding your belongings at speed (or rest). The outer phone pocket on the right of the midsection is particularly unique, allowing for easy access while on the move.

The material and the half-zip design are well suited to high-output activities like running, biking, or hiking in cool temperatures. Ciele made it with winter running in mind but we think it'd be the perfect light midlayer for fall backpacking too. Zip it all the way up for extra protection, and zip it down (or unzip from the midsection while keeping the neck closed with the two-way zipper) to dump heat. This midlayer offers a fantastic blend of convenience and performance, though the focus on breathability means it won’t be the best choice for prioritizing warmth in the backcountry, or wearing as an outer layer during low-output activities.

Count on Montana-based Beringia to create a midlayer that is either the perfect packable insulator or a total oddity, depending on your taste (and interest in sleeves). The Kuki is a featherlight, short-sleeved “sweater”—but let's be real, it's a zip-up down t-shirt—that can be worn over a baselayer for added warmth, much like a vest, or under a shell. With high-quality 850-fill down as insulation, it's super packable, and it can be packed into its own chest pocket. Then you can easily deploy it during outings with potentially wide temperature swings, like an early-start spring ski tour that extends into a full-sun afternoon. It’s an easy one to stash in a bag for ultralight hikes that might get cool (but not frigid), or to throw in a backpack when traveling. It ends up tagging along more often than you think it will. The unconventional design might not be for everyone, but we've found it to be one of the more versatile options on the list.

Dialing in the right protection on winter runs can be tough. You don’t want to start out cold, but you also don’t want to overheat one mile in when there are many more to go. The AURAS Ultrafleece Hoodie from Janji is a breathable-warm solution. It's made of fabric that's similar to Octa or Alpha fleece in that it has ultra-breathable and loosely knit fibers to maximize warmth and breathability in a lightweight package. And the AURUS is as light as it gets, clocking in at 132 grams. The mesh exterior allows air to permeate the fabric, while the brushed fleece interior wicks moisture to the surface, helping keep you dry if you start to sweat. Let's be real, if you're running, you'll probably get sweaty, even in sub-zero temps, but in this you're less likely to have a drenched and clammy experience.

The AURAS fleece is lighter and more breathable than the Ciele VLVHalfzip, allowing it to be utilized in a warmer temperature range. You might not want to wear it in freezing temps without a shell, but above 30 degrees it can work as an outer layer as long as you’re moving with pace and working up a sweat. The quick-venting fabric will keep you cool and dry as you heat up.

When it comes to ultralight insulation, nothing beats the Ghost Whisperer ultralight down jacket. The iconic layer from Mountain Hardwear has been around for over a decade thanks to its match of ultralight warmth and midlayer utility. Its design is simple, with 800-fill goose down insulation, the ability to pack into its own pocket, a cinchable hem and elastic cuffs, and not much else. That streamlined nature keeps the weight low, making it a great jacket for alpine climbing or backcountry excursions under a shell.

We've worn the Ghost Whisperer as a midlayer for pretty much everything: skiing, camping, canoe tripping, hiking, climbing. Its 10-denier nylon shell is super thin, which helps the jacket achieve its low weight but can also make it more prone to tears than 20D down jackets. But if you're traveling light and take care of your gear, the tradeoff is worth it. (You can always patch up any snags, too.) This jacket is pretty much always stuffed into the last few square inches of space in our pack—and that's all the space it needs—as a just-in-case layer for when an extra puffy jacket is called for.

If you're looking for a durable down jacket that you can live in for three seasons, the Helium is it. The down jacket is warm, has a durable 20-denier shell, and provides some protection from the elements with wind proofing and water repellency, while also being lightweight and highly compressible.

Considering how warm it is, you probably won’t be rocking this as a midlayer during high exertion outings in which weight and breathability are major concerns. But it's lightweight and compressible enough for the majority of slower moving adventures, like multi-day hikes, wearing under a ski shell, or keeping warm at the campsite. With its light weather protection, the Helium down jacket is as much an everyday outer layer as it is a midlayer during colder conditions. This winter, it became one of our everyday go-tos for getting around town and up to the ski hill.

The Tek Approach Jacket features FUTUREFLEECE, the North Face’s Octa fabric, which utilizes lightweight, hollow-fiber fabric that traps heat efficiently while breathing well and drying fast. This allows it to thermo-regulate exceptionally well. The feel against the skin is fuzzier and lighter than the R1, though not as soft as the High Loft Crew. Designed for hiking, this jacket provides a combo of warmth and ventilation without thick layers of insulation.

Even though it's a technically fleece, the Tek Approach Jacket has a DWR coating and WINDWALL technology, giving it a protective edge over other options on this list. That helps it excel in the changing conditions one might encounter in the mountains. Light precipitation beaded off the fabric during test hikes in the drizzle, and the WINDWALL worked well even on cool bike rides. For serious weather you'll still need a shell, but it's sort of the best of both worlds.

Due to the lack of insulation, the Tek Approach jacket might not be the one you grab for a winter outing at elevation (not without a down jacket to throw on over it during any breaks). But it's perfect as a standalone jacket for a shoulder season hike, or as a midlayer in dodgier weather.

Sometimes the best midlayers are the simplest, and what the Mock Neck lacks in features or adjustability it makes up for in packability, performance, and price. It's made of Polartec's Alpha Direct fleece, a fabric developed for US Special Forces in order to maximize warmth while also providing best-in-class breathability. Garments made of Alpha Direct have become beloved in the ultralight world, and this midlayer offers tremendous warmth in an ultralight package, no matter which of the three weights you choose.

Because Alpha Direct is so light and breathable, it's best for high-output activities in cold weather. The fabric is super soft and fluffy (it can shed a little bit too, FYI) but it doesn't have any weather protection and wind cuts right through it. That's why this is best treated as an extra layer of insulation that you can wear under a shell—or on its own when the weather is nice.

How I Tested These Midlayers

As a four-season bike commuter, PE teacher, and athletics coach based in New England, I live in midlayers, and every day is filled with movement. I tested these layers during a brutal northeast winter, wearing them during days on the slopes and while shoveling the driveway; while rucking and hiking in the woods this spring; while on road and trail runs in all seasons; and while bike commuting and coaching my school’s mountain biking team. This gave me the opportunity to assess the best midlayers in a variety of conditions and activities.

Guide Key

Choosing the right midlayer depends on the activity and the conditions you need it for.

When warmth is essential, an insulated option (BERINGIA Kuki Jacket, Mountain Hardwear Ghost Whisperer, Peak Performance Helium) is going to be your best bet.

For high output activities in which dumping heat is essential, a fleece will be a better choice (Patagonia R1 Air Crew, Snow Peak Polartec High Loft Fleece Crew, Ciele VLVHalfzip, Janji AURAS Ultrafleece Hoodie, Pa'lante Alpha Mock Neck).

Lastly, consider the activity. For extended time in the mountains additional features like pockets and hoods might be preferable (The North Face Tek Approach FUTUREFLEECE Jacket, Mountain Hardwear Ghost Whisperer, Klattermusen Vale Jacket, Peak Performance Helium) whereas when prioritizing moving fast and light, a more streamlined option is the best choice (Patagonia R1 Air Crew, Ciele VLVHalfzip, Janji AURAS Ultrafleece Hoodie, Pa'lante Alpha Mock Neck).

What to Consider When Buying a Midlayer

Breathability

A midlayer’s job isn’t just to keep you warm—they also need to keep you comfortable while you’re moving. That means letting heat and moisture escape so you don’t overheat or end up soaked from the inside out. Fleece fabrics excel here, allowing body heat and moisture to move through while still trapping enough warmth to take the edge off. Down jackets tend to be less breathable. There are ranges in both categories—generally, the warmer a garment is, the less breathable it will be, but even this depends on the materials used and the construction. If you run hot or plan on high-output efforts, prioritize breathability over outright warmth.

Fleece vs. Puffy

This is the big fork in the road. Fleece and other fabric-based midlayers tend to be more permeable, and better for movement. It dries quickly, and most fleece maintains warmth even when wet.

Puffy jackets made with down or synthetic insulation trap more heat, which is ideal when you’re static or are in truly cold conditions. If you’re moving with pace you probably need a fleece. If you’re dealing with real cold or engaging in a lower output activity, bring a puffy.

Complicating matters, there's active insulation, which comes in various forms but often as a highly breathable puffy.

Eventually, you'll want one of each.

What Activity Are You Doing?

What you’re doing matters as much as the weather. Pursuits like running, ski touring, or fast hiking demand lightweight, breathable layers that won’t bog you down. Slower days—resort skiing, casual hikes, or hanging at camp—open the door for warmer, more feature-rich pieces. Midlayers are meant to regulate temperature, not just add heat, so match the layer to your effort level. Bulk is a factor too—what does your outer layer look like? Your midlayer should fit comfortably beneath it.