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ExOfficio Boxer Briefs - Underwear (For Men) in Black - 2nds
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$17.95 Save 30%
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Terramar Body Sensors® Boxer Briefs - Tech Mesh Pro-Jersey (For Men) in Black - Closeouts
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$9.95 Save 44%
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Icebreaker Everyday Boxer Briefs - UPF 20+, Merino Wool (For Men) in Cave - Closeouts
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$23.95 Save 31%
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Icebreaker Oasis T-Shirt - UPF 30+, Merino Wool, Lightweight, Short Sleeve (For Men) in Cave - Closeouts
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$51.95 Save 30%
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Icebreaker Oasis Shirt - UPF 30+, Merino Wool, Long Sleeve (For Men) in Concord - Closeouts
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$62.95 Save 30%
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ExOfficio Briefs - Underwear (For Men) in Charcoal - 2nds
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$13.95 Save 30%
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Kenyon Base Layer Bottoms - Polartec® Power Stretch® (For Men) in Navy - 2nds
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$32.50 Save 40%
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SmartWool 2013 PhD HyFi Hoodie Jacket (For Men) in Black - Closeouts
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$144.95 Save 34%
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Terramar Helix T-Shirt - UPF 25+, Long Sleeve (For Men) in Gunmetal - Closeouts
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$14.95 Save 40%
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Icebreaker Original Zip Base Layer Top - Merino Wool, Zip Neck, Long Sleeve (For Men) in Gravel - Closeouts
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$104.95 Save 30%
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Icebreaker Oasis Base Layer Leggings - UPF 30+, Merino Wool (For Men) in Monsoon - Closeouts
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$62.95 Save 30%
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Columbia Sportswear Omni-Heat® Base Layer Top - Midweight, Long Sleeve (For Men) in Grill - Closeouts
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$35.95 Save 34%
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2(x)ist No-Show Underwear - Briefs, 3-Pack (For Men) in White - Closeouts
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$19.95 Save 37%
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Icebreaker Apex Base Layer Bottoms - UPF 30+, Merino Wool, Built-In Fly (For Men) in Cave - Closeouts
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$69.95 Save 30%
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Icebreaker Sonic Crew Top - Merino Wool, Long Sleeve (For Men) in Force - Closeouts
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$69.95 Save 30%
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About Men's Underwear & Base Layer

Dressing comfortably starts with selecting the right men’s underwear. Every man knows whether he prefers boxers, briefs, cotton blends, flannel or silk. But besides standard men’s underwear (boxers and briefs), winter activities require the warmth of men’s thermal base layer underwear. Since this layer is the closest thing to your skin, most men’s base layer underwear is made of breathable, moisture-wicking fabric. Unlike traditional cotton underwear, performance fabrics aid in the evaporation of sweat and prevent rapid cool down. It’s important to consider the weight when choosing men’s thermal underwear: lightweight, midweight or expedition weight are common. Look for men’s base layer underwear or wicking T-shirts featuring technological innovations like X-Static® for increased odor-resistance or Dryflo® for enhanced wicking. Merino wool and featherweight silk men’s thermal underwear are natural options for wicking underwear. Look for men’s underwear from high-quality brands like Terramar, Kenyon and Mountain Hardwear.
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