I wore this Patagonia thermal base layer shirt under a ski jacket in Colorado and it kept me dry and warm on the mountains.

If you’re part of the “always freezing” crowd — especially if you live in a colder climate — warm winter base layers are a ...

We tested the best men's base layers of 2025 with options for every budget. Top picks include Ibex, Patagonia, SmartWool, and ...

The henley fit is more casual and is often used for wear outside of base layers. We didn't just pick any old thermal shirt off the shelf—we tested the best of the best like we were gearing up ...

The Thermajane Long-Sleeve Thermal Shirt has more than 4,600 five-star ratings from Amazon shoppers, and it’s on sale for as little as $11 today. The long-sleeve shirt has an ultra-soft layer of ...

One of the most obvious places to start protecting yourself from the cold weather is a trusty set of base layers. In basic terms, these are tight-fitting, thermal undergarments that create an ...

Another reviewer said the set’s the “perfect base layer,” keeping them warm in temperatures as low as 15 degrees because “the wind doesn’t get through.” A skier who doesn’t hit the ...

At Debenhams, the Fleece Top Cowl Neck Lightweight Jumper is on sale for £21.99. You can also get the Mountain Warehouse Thermal Base Layer Lightweight Merino Top with a 50% reduction, now £29.99 down ...