Wool - Wool tends to be more expensive than synthetic base layers, but it also has the best balance of heat efficiency, odor control, and moisture wicking capability. Because wool is so breathable, it’s easier to regulate our body temperature during high-output activities. It might not be something you’d wear outside on its own, but it’ll be my go-to performance layer a lot as it gets colder, especially as its smooth surface slides nicely under a jacket. As a 100% synthetic base layer, it’s also a good option for folks who prefer a vegan base layer or are sensitive to wool. F

Thumbholes on sleeves - Football - Clothing | adidas UK

While specific fits of base layers are designed for certain use case scenarios, it’s essential to choose a base layer that you feel comfortable wearing. Initially found in sports such as cycling and skiing where lightweight functional clothing plays an important part in performance, b ase layers have become a popular addition to many equestrian wardrobes. At Treeline Review, we love functional clothing, but we love fashionable AND functional clothing even more. Cons: Lacking antibacterial qualities, synthetic materials are likely to trap sweat and smell if they’re not washed straight after being worn. Regardless, a counter argument here is that because the sleeves are longer, if you’re not using the thumb holes you might end up with extra fabric bunched around your wrists that you have to fit under gloves and jackets, or figure out how to wear with your GPS watch, and that in turn could be a reason to avoid them.

We often forget to apply sunscreen to our hands and find it wears off faster than other areas so while it won't provide total protection, it may offer a useful shield. We like that there are no drawstrings to get caught in backpack straps, climbing equipment, or the washing machine. Pick from base layer tops and base layer bottoms, and feel the motivation to keep running in any conditions. Our testers found the design flattering, but some complained about its poor sweat-wicking ability, which left them feeling cold and damp. As more people like Jenny Bruso from Unlikely Hikers speak up about how tough it is to find plus-sized outdoor gear, we’re hopeful that more brands will step up.

Mens Baselayers | All Mens Baselayer Clothing | GO Outdoors Mens Baselayers | All Mens Baselayer Clothing | GO Outdoors

On top of that, there was a rockslide on the North Kaibab Trail in the Grand Canyon that will leave that part of the AZT closed until June. But if you want a lightweight base layer for spring, summer, and fall hiking, the Patagonia Capilene Cool is our go-to base layer. If you regularly exercise outdoors, you’ll love our winning base layer’s array of features, including thumb holes, hi-vis design elements and pockets.

The Smartwool Classic Therma l is also beloved by Outdoor Gear Lab, Switchback Travel, REI, and Greenbelly. In our testing, it was incredibly durable and wicks and breathes well, even during high-exertion activities. Mention body mapping tech when it comes to a piece of workout kit and you’ve successfully caught our attention.