Purpose-built for comfort that lasts all day, the women's Smartwool Merino Plant-Based Dye T-shirt is versatile enough to be worn on its own or with weather-appropriate layers.

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A great tee for gym sessions, pavement loops and trail quests, the men's Smartwool Merino Sport 120 T-shirt delivers cooling comfort however you're working up a sweat.

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Made for the times when you break a sweat in cool temps—did someone say a fall hike or early spring mountain bike ride?—the men's Smartwool Merino Sport hoodie keeps you feeling comfortable and fresh.

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A long-sleeved tee that works with you as you move, the Smartwool Merino Sport Logo Graphic tee helps with thermoregulation, odor control, dry times and durability so you can keep up the intensity.

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Vertical color blocks and an athletic fit make the men's Smartwool Merino Sport long-sleeve crew a sharp and practical top to wear when diving into your mild-weather outdoor activities.

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With vertical color blocks and an athletic fit, the men's Smartwool Merino Sport long-sleeve crew is a sharp and practical top to wear when diving into your mild-weather outdoor activities.

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Made in a supersoft merino wool and TENCEL™ lyocell blend performance fabric, the Smartwool Active Ultralite High-Neck tank top is primed for intense workouts while also being suitable for daily wear.

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Great for sweaty training runs or trail hikes, the women's Smartwool Merino Sport Ultralite Hoodie has a lightweight, natural softness that makes it an excellent option no matter what your day holds.

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The athletic fit of the Smartwool Merino Sport Ultralite long sleeve complements the movements of your body, while the merino wool fabric blend helps you feel cool even as your activity intensifies.

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Great for hiking and everyday wear, the men's On Merino T-shirt has thermoregulating and antimicrobial properties that make it a wardrobe staple for year-round outdoor activities.

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Thanks to its breathable and temperature-regulating merino wool-blend jersey construction, the Smartwool Merino women's scoop-neck tank top is game for any adventure, any time of year.

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Layer up in classic flannel warmth with a color-pop twist in the men's Cotopaxi Mero Flannel shirt. A heavyweight with a soft hand, it can be worn alone or layered over your favorite tee.

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Whether you rock it on the singletrack or pair with jeans at the dog park, the Wild Rye Merritt women's muscle tank top keeps you cool and dry with sweat-wicking, wrinkle-resistant fabric.

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With a flowing fit and built-in bra, the women's Free Country Microtech Chill B Cool Cami top is designed to keep you cool—perfect for getting outside on warm days.

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