A lightweight base layer with a shortened silhouette, the women's Wild Rye Jane Lite crop leggings will keep you warm (but not too warm) from spring skiing to summer camping.

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With stretch micromesh fabric for quick-drying performance and support, the odor-resistant men's Saxx Kinetic HD boxer briefs let you launch into backcountry runs or marathon training sessions.

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Looking for a base layer legging with a sleek, soft design? The women's Kari Traa Klara high-waist base layer pant has a slim silhouette with an extra-high, extra-comfy waist for added coverage.

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Combining a warm, breathable 100% merino wool exterior with a 100% LIFA® wicking interior, the Helly Hansen LIFA Merino Midweight Graphic pants are the perfect base layer for cold-weather pursuits.

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A go-to base layer for winter play, these Kari Traa Lam base layer pants are a supersoft, supersmooth pair of merino wool leggings with ergonomic lines for a pro-sport look.

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Naturally odor-resistant with mesh ventilation to help prevent you from overheating, the women's Kari Traa Lam base layer pants have a supersoft feel for next-to-skin comfort in any season.

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Spun from superfine merino wool, the women's Kari Traa Lam long-sleeve base layer top is exceptionally soft, smooth and breathable for easy layering year-round.

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With its stretchy, supportive and quick-drying fabric, the prAna Lanya bra keeps you moving through workouts, yoga sessions and warm-weather hikes.

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Lightweight and breathable, the Obermeyer Lean Crop base layer tights provide on-mountain comfort with a length that won't interfere with the fit of your boots.

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Made with a brushed feel for easy comfort, the Marmot Leda sports bra is ideal for morning spin classes, afternoons at the climbing gym, and any other low-impact workout.

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Make your first layer a comfortable one with the men's Picture Organic Clothing Lhotse base layer pants. They feature chafe-free seams and a nonirritating elastic waist band.

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Combining a warm, breathable 100% merino wool exterior with a 100% LIFA® wicking interior, the women's Helly Hansen LIFA Merino Midweight crew top is the perfect base layer for cold-weather pursuits.

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Fend off the chill and stay out longer in the men's Helly Hansen Lifa Merino Midweight base layer pants. Built for winter fun, they blend merino wool with technical fabric to keep you cozy and warm.

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Layer up for sledding, skating or shredding in the men's Helly Hansen Lifa Merino Midweight Crew base layer top. Its 2-layer construction combines cozy merino wool with durable technical fabric.

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