Try the men's Smartwool Winter Adventure Long-Sleeve Graphic T-shirt on for size and experience the comfort of merino wool and the durability of recycled polyester firsthand on your next adventure.

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When you want a layer that can help keep you dry and comfortable when you're going to break a sweat, reach for the men's The North Face Winter Warm Essential Crew long-sleeve shirt.

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Wear it as an insulating layer under your jacket or as an outer layer on high-output activities—The North Face Winter Warm Essential slim-fitting crew shirt is a perfect cold-weather option.

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The North Face Winter Warm Essential Crew women's top brings flatseam comfort, a close-to-skin fit for easy layering and moisture-wicking tech to keep you going when cold days demand high output.

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A great option for cold conditions, the RaidLight Wintertrail zip top's stretch Thermofleece fabric has a smooth face and brushed lining for unrestricted movement, comfort, warmth and breathability.

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Simplify your cold-weather runs in the men's adidas X-CITY long-sleeve shirt. This lightweight pullover is made with a stretchy and seamless fabric, ensuring chafe-free movement for all your workouts.

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Made for running but easily moving through the rest of your day, the men's men's adidas X-City G long-sleeve T-shirt wicks sweat, dries fast and feels great.

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This soft Yosemite Bear men's T-shirt by Kid Dangerous sports a vintage-styled graphic depicting the California park's most curious local—set against an iconic backdrop.

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Rep the national park near and "deer" to your heart with the women's Parks Project Yosemite Fawns T-shirt. This soft, midweight top is great for year-round wear, whether you layer it or wear it solo.

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A herringbone knit you can work out in? Yep, prAna made that happen. And chic style is just the beginning, because the women's Zawn tank top is deliciously soft and stretchy, too.

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Stay cool during your runs, workouts, lifting sessions and pick-up games. The men's Vuori Zephyr Muscle T-shirt is lightweight, breathable and ready to go.

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Follow the breeze wherever it flows—and stay comfy while you do—in the men's Vuori Zephyr T-shirt. It's a lightweight, stretchy and breathable tee that's great for runs, hikes, flights and more.

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This soft Zion Eagle men's T-shirt by Kid Dangerous captures the soaring majesty of Utah's most-visited park with a vintage-styled graphic of an iconic bird of prey.

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Built to be lightweight and breathable on your high-exertion days, the men's Icebreaker ZoneKnit long-sleeve T-shirt features body-mapping technology to provide ventilation and temperature control.

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