The 8 Best Men’s Thermal Shirts to Keep You Warm—and Alive

Wide Open Spaces |

As the closest layer to the skin, base layers—also known as thermal shirts—don’t always get the fanfare that outerwear gets. But thermal shirts provide multiple important functions: They’re engineered for comfort, durability, and maintaining core body temperature, all while soaking up sweat so it doesn’t pool on the skin.
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Featured Product: Vertx Full Guard Performance Long Sleeve

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