Men’s Baselayer Tops

Whether you're looking for foundational warmth, lightweight performance, or both, men's baselayer tops from Columbia Sportswear have you covered. The next-generation version of long underwear, these layers are built for protection, performance, and comfort while you're active outdoors in all kinds of weather.

With a variety of sizes, styles, and features (like thermal-reflective, sweat-wicking, comfort stretch fabric) to choose from, our selection of versatile and durable base layers deliver year-round.