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

A great ski outfit starts with a warm and breathable base layer.

If you’re part of the “always freezing” crowd — especially if you live in a colder climate — warm winter base layers are a wardrobe must, from thermal undershirts and long johns to cozy socks. Many of ...

The Spatz Basez Extreme is no doubt a very capable deep winter base layer, but its real strength is how it allows you to ...

There is an art to layering, which if you ask me, is an essential for fall and winter. As a woman who ... And then on days when I need a base layer that is a seamless, flattering foundation ...

Breathable, lightweight, and stretchy, this thermal shirt is sure to keep you protected as a base layer ... re running in the winter, but that's not always the best bet. Layers are actually ...

When it comes to base layers (and other winter essentials, like wool socks), the experts are unanimous: merino, merino, merino. This natural fiber is one of the best materials for trapping warmth.

Finding the right base layers to get you through winter will depend on factors such as your preferred fit and style, budget, local weather conditions and the activities you plan to engage in.