For a lightweight trekking shirt that keeps you warm, opt for the plaid men's Fjallraven Fjallglim shirt. Behind the classic flap chest pocket, a second chest pocket lets you securely stow essentials.

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Made from 100% cotton and styled in classic plaid, the Columbia Flare Gun Utility men's long-sleeve shirt has all the hallmarks of a trusty button-up that dresses up or down to suit your day.

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The lightest-weight top in the Flight Series™ line, this men's The North Face Flight Weightless shirt breathes and stretches to keep you flying down the trails in comfort.

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Take your pick—and then take a hike. With 2 complementary color tones, the women's Flip It Reversible tee from alder can be worn 2 ways over 2 days.

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It looks like a long-sleeve tech top, but feels like a cloud. The Oiselle Flyout long-sleeve shirt is built with HoverFit™ technology for a cool, breezy fit.

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When you're ready to up your "tech top" game and experience the beauty of a sweat-moving and cool-making top, reach for the Oiselle Flyout shirt.

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Packed with sun-stopping UPF 50 protection and designed to keep moisture at bay, this boys' Columbia Fork Stream hoodie brings the shade on sunny days by the water.

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Made to shade, the boys' Columbia Fork Stream performance shirt features sun-stopping UPF 50 protection and moisture-wicking properties to keep him dry.

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With lightweight stretch fabric that's smooth and silky soft on your skin, the women's prAna Foundation crew-neck top is ready for yoga, for casual outings or, really, for anything.

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A soft, wicking long-sleeved tee made from a recycled polyester and cotton blend, the men's Marmot Freestyle T-shirt displays wide skis in a mountain scene with a Marmot logo.

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Designed with a supersoft, worn-in feel, the kids' Cotopaxi Friends With Nature T-shirt has cover stitching and a screen printed label for extra comfy wear, making it perfect for travel and play.

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Made from cotton single jersey and designed with a boxy fit, the adidas Future Icons 3-Stripes women's T-shirt is so comfortable you'll want to incorporate it into every look.

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Crafted to the highest standard of tees, the men's Poler Garden T-shirt is the perfect companion for any adventure—from camp to the couch and everywhere in between.

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Crafted to the highest standard of tees, the men's Poler Garden T-shirt is perfect for camp, the couch and everywhere in between. A fresh Poler tee is the perfect companion for any adventure.

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