The Patagonia Capilene was previously an award winner in our lineup, and we retested the latest version from Patagonia for our March 2026 update. While it is still a highly breathable, and comfortable layer, some changes were made that we were less pleased with. The first is the updated fit, which runs much looser than previous versions and, in our opinion, doesn't retain heat as well as a close-fitting layer. While this could be solved by simply sizing down, our second complaint is with the durability of the shirt. We found small holes near the seams and major pilling after just a few weeks of testing. For these reasons, we removed the award from this shirt. Our full review below goes over more features and performance of the latest version of this base layer.
The Polartec fleece traps a surprising amount of body heat, while the long zip neck and microgrid design successfully allow the garment to vent and release moisture. While we're disappointed in the latest iteration when it comes to the updated fit (larger and not as warm), as well as the durability (holes in the fabric after minimal use), and those utilitarian elastic thumb loops, it is still a unique synthetic design that provides solid performance for women in motion.
When considering the Thermal Weight Zip-Neck, the first thing to do is acknowledge that this layer should not be called a thermal weight as advertised, but rather a midweight base layer that prioritizes breathability, making it appropriate for cool to cold weather conditions. However, it traps an impressive amount of body heat for its weight. We noticed how well the Thermal Weight Zip-Neck performed once the temperatures dropped in Yosemite Valley and when it snowed on another trip to Utah. We took this layer for extended trail runs before selecting it to keep us warm for three cold October nights sleeping on the side of El Capitan.
Features like the Polartec power grid fabric, the longer drop tail hem, and the soft micro-grid fleece interior kept us warm during our fall adventures. However, the most recent fit is larger than the last and allows more airflow to permeate the design. The previous version maintained a slim fit that was more effective at trapping body heat, and therefore, we docked a couple of points from the overall score in this metric. If you want a closer fit, we recommend sizing down.
The Thermal Weight Zip-Neck shines in the breathability category thanks to the fabric's open grid pattern that is practically see-through when held up to sunlight. The long, center neck zip contributes to this layer's high breathability, allowing a great balance between retaining body heat and releasing sweat built up during intense activity.
While not the best choice for hanging out on a windy peak without a layer over top, it's perfect for women seeking breathability and sun protection when you're on the ascent. The fit of the newest iteration lacked some of the wicking performance we appreciated in the past. We noticed the fabric absorbing more moisture because its larger fit doesn't sit as close to the body as before. That said, it's still a great synthetic option for women who like to moderately push the pace and work up a sweat.
The past Thermal Weight Zip-Neck was more of a slim fit, but is now what we would consider a regularly-fitting base layer. It has offset shoulder seams to prevent chafing when carrying a heavy pack and internal neck tape and flatlock seams for increased comfort. Our testers also appreciate the gusseted underarms and drop tail hem for increased coverage and warmth, especially when engaging in activities like rock climbing, when you're reaching high overhead, and layering with a harness. This also works well if you want to keep your top tucked into your ski pants, or just need a little extra coverage for your tush when out on a winter walk. While the updated design remains comfortable to wear, the much larger fit left our testers scratching their heads.
This layer's 92% recycled polyester creates a soft feel next to the skin, and the 8% spandex provides enough stretch for a full range of motion. Ultimately, this base layer feels comfortable next to the skin, and the polyester spandex fabric combination allows for ease of movement, no matter what adventure you have up your sleeve.
While we didn't have any durability complaints with the Thermal Weight Zip-Neck during our previous rounds of testing (we still have the old version almost 4 years later), we unfortunately encountered major issues in this round. After minimal use, we started noting holes in the grid-patterned fabric, especially near the flat lock seams. We also noted lots of pilling on the front of the layer near the zip neck, which we assume is due to friction with jackets and midlayers interfacing over it. On the bright side, the permanent odor-free Polygiene treatment appears more effective in this round of testing, and we didn't detect any body odor buildup in the fabric, even after several days of use without a wash.
As with the previous iteration, we're still disappointed in the super thin elastic thumb loops on the sleeve. Technically their basic design is effective for holding the layer in place while you layer over top, and they do provide more warmth by pulling the fabric over the hand, but they lack comfort and the design is no basic, it's almost as if Patagonia threw them in as an afterthought rather than considering what it's like to go for a long run with the elastic rubbing against your skin as you stride. These durability concerns along with the updated fit that seems to stretch out even more with use, make it harder for us to recommend this formerly award-winning design.
Drying speed can be an important consideration for a base layer you're planning to take into the mountains. Synthetic layers, like the Thermal Weight Zip-Neck, often provide a faster speed than their wool competition, and the see-through, lofted fabric only helps speed up the process. The latest iteration required a longer drying time simply due to there being more fabric to a size S than before. It went from completely soaked to fully dry in about 40 minutes in the sun.
In real world use, sweat is the actual moisture you have to worry about. After returning from a sweaty trail run, the Thermal Weight needed a modest 25 minutes to air dry on our body, a testament to this layer's exceptional breathability. While polyester material is considered more durable than 100% pure Merino wool, we still recommend allowing this layer to air dry overnight away from heat sources to increase the lifespan of this layer.
Thanks to a smooth face fabric and stretchy spandex material, it is easy to layer over the Thermal Weight Zip-Neck. Former versions of the design were more difficult to layer underneath due to the slim-fit, however, the most recent iteration features a much larger fit that you can layer more than just a sports bra underneath. The stretchy fabric easily glides over the top of a t-shirt, other synthetic base layers, or tanks.
Unfortunately, Patagonia uses the same uncomfortable minimalist thumb loops in the latest Thermal Weight Zip-Neck design. We love a thumb loop; it sets you up for easy layering and better coverage for the hands on colder days, but the thin, elastic loops on the Capilene can be abrasive during runs or climbing the skin track, often leaving our testers wishing it were better integrated into the sleeve.
In the past, our testers felt that the Patagonia Capilene Thermal delivered higher performance than its price tag suggests, but this latest round of testing left us unsure. It successfully traps heat and wicks moisture incredibly well, thanks to a Polartec and spandex construction that feels soft next to the skin, but we wish the latest version included the same durability and fit of the previously tested layers. Still, it can be a good choice for those seeking a synthetic option for cold-weather mountain pursuits, as long as you're not too hard on your clothing.
While our testers love the previous iteration of the synthetic Capilene Thermal for its superior warmth and breathability, we found a new top dog when it comes to ample warmth and breathability. The Stio Trax Power Grid Half Zip Hoodie is our new go-to layer when it comes to high-output activities outdoors that require ample breathability to maintain comfort. The hood, zip neck, and discreet thumb loops give us exactly what we're looking for in a high-quality layer. And if you're for a layer that can handle more technical adventures, the Arc'teryx Rho Hoody is another great option for those seeking versatile warmth from the campsite to the skin track. We love the balaclava hood that traps body heat and provides sun protection in addition to the brushed fleece interior that feels great next to your skin.
| Awards | |
|---|---|
| Price | $109 List Check Evo (on sale!) |
Overall Score  |
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| Star Rating | |
| Bottom Line | This layer is perfect for those seeking ample breathability to maintain comfort during their high output mountain activities |
| Pros | Superior breathability, excellent warmth, long zip neck for venting, comfortable micro grid fleece interior, fast drying |
| Cons | Fabric holds odor, thumb loops lack quality, not a thermal weight despite name, latest version lacks durability, updated fit is off |
| Rating Categories | Patagonia Capilene T... |
| Warmth (25%) | |
| Breathability (20%) | |
| Comfort and Fit (20%) | |
| Durability (15%) | |
| Drying Speed (10%) | |
| Layering Ability (10%) | |
| Specifications | Patagonia Capilene T... |
| Fabric Weight Class | Midweight |
| Material | Polartec Power Grid with HeiQ Pure: 92% recycled polyester, 8% spandex jersey |
| Fit | Regular fit |
| Odor Control Fabric | HeiQ Pure odor control |
| Avaliable Cuts | Zip neck |
| Torso Length | Long |
| Thumb Loops | Yes |
| UPF Sun Protection | None listed |
| Flat-lock Seams | Yes |
| Measured Weight (Size Small) | 5.4 oz |
