Mens Lightweight Long Underwear - Tops
This year when you're looking down a line stacked with cliff bands, at least you'll know you're not shaking from being cold. The Mountain Hardwear Men's eXtend Featherweight Zip Tee is a lightweight a... more...
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5 out of 5
Wear the SmartWool Men's Microweight Long-Sleeve Crew Shirt for cool- or warm-weather aerobic activities or as a next-to-skin base layer. SmartWool's porous natural fibers move moisture while it is s... more...
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4 out of 5
Outdoor Research combines the technical performance of wool and polyester with the Men's Sequence Zip Tee. Dri-Release wool fabric dries quicker than regular wool, doesn't cause itching, and fights od... more...
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0 out of 5
Sherpa Adventure Gear added bamboo charcoal to the Men's Baans Tech -Zip Top because it wicks sweat quickly, and it's an antimicrobial that prevents this shirt from stinking of B.O. Wear the Sherpa A... more...
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0 out of 5
The close-fitting Burton Men's Long-Sleeve Compression Crew provides efficient insulation under your fleece, and is so light you'll hardly know you're wearing this performance long underwear baselayer... more...
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0 out of 5
The Icebreaker Men's BodyFit Mondo Zip Top not to be confused with a turtle neck. Sure, this versatile top has a high neck, but no turtle has a zip. This lets you regulate your temperature and/or show... more...
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0 out of 5
Wear the Icebreaker Men's BodyFit150 Atlas T-Shirt for traveling the globe, going for a hike, or hitting up the local climbing gym for a quick bouldering session. The slim-fit cut frames your silhouet... more...
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The Patagonia Men's Capilene 1 Long-Sleeve Crew is an ultralight, fast-wicking top for warm-weather trail runs or hikes. Wear this silky long-sleeve shirt to stay dry as you sweat and to keep the sun ... more...
The Arc'teryx Men's Rho LT Zip Neck Shirt gives you a rock-solid foundation to layer warm and layer well. Rentex Powerflex material allows for a wide range of movement and has a great warmth-to-weight... more...
Zip up the Ibex Men's Woolies Zip T-Neck to tackle the steep and deep and then keep it on for that apr s ski party with friends. When you skin up on your next ski tour, the New Zealand merino wool pul... more...
Wear the SmartWool Men's Lightweight Zip-T long-sleeve shirt for cool-weather aerobic activities or as a next-to-skin base layer. SmartWool's porous natural fibers move moisture while it is still in v... more...
The Arc'teryx Men's Rho LTW Zip Top is a great base layer to wear for long winter days in the backcountry. Made from fine, lightweight, super-soft merino wool, the Rho Top keeps you comfortable in a w... more...
Whether used as a layering piece or worn alone, the anti-microbial Marmot Men's Lightweight Long-Sleeve Crew wicks moisture away from your skin when you work up a sweat. The Lightweight Crew's stretch... more...
Layer with the moisture-wicking Marmot Men's Lightweight Long-Sleeve Zip Neck shirt on chilly days and bust open the neck zipper when you need to dump some serious heat. Made with Polartec's stretchy,... more...
Wear the Helly Hansen Men's Crew Long-Sleeve T-Shirt as a base layer when you skin up a ridge for turns or alone for trail run in cold weather. This crewneck shirt wicks perspiration and dries quickly... more...
Tired of your base layers restricting your movement? The North Face Men's XTC Lightweight Crew has underarm gussets for a full range of motion. This long-sleeve shirt's grid-texture fabric grabs sweat... more...
Layer the Ibex Men Woolies Crew Long-Sleeve Shirt under other layers in the winter, or wear it by itself for cool weather aerobic activities. This form fitting merino wool shirt does everything a firs... more...
The Icebreakers Men's BodyFit200 Oasis Crew is a great all-around lightweight base layer made from the ultimate breathable insulation Merino wool. Merino isn't your average wool, and the Oasis Crew i... more...
Slip on The North Face XTC Lightweight Zip shirt before a fall trail run or use it as your base layer in the winter. The North Face gave this performance baselayer its new carbon, charcoal polyester... more...
Forget your fears about itchy wool the Backcountry.com Men's Merino Long-Sleeve Crew Shirt is a whole different beast. We made this base layer with super fine 18-micron New Zealand Merino which simply... more...


























