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NEW CUSTOMERS  - SAVE 15% - USE CODE: NEW2TREKT. EXCLUDES SELECT BRANDS/ITEMS.

Men's Baselayers & Underwear

63 Products

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  • Thin yet effective, Columbia's midweight baselayer is perfect for skiing or cold-weather hiking. A 1/2 zipper allows for easy venting, helping you avoid the hassle of shedding an entire layer.

    Our Price:
    $24.00
  • Patagonia's most breathable synthetic baselayer keeps you dry and comfortable in cool conditions - with a 1/4 zipper for ventilation.

    Our Price:
    $29.40
  • Patagonia's most breathable synthetic baselayer keeps you dry and comfortable in cool conditions.

    Our Price:
    $27.00
  • Patagonia's stretchiest synthetic baselayer keeps you dry and cool in warm conditions, with 50-UPF sun protection.

    Our Price:
    $17.40
  • Nice and warm, the Men's HyFi full zip is going to be a new favorite for trail runs and hikes throughout the cold chilly months. Wear it as a midlayer for ski/snowboard adventures or as a standalone on those more moderate weather days on the trail.

    As Low as:
    $80.00
  • Stay comfortable and dry in cool to warm conditions in Patagonia's fastest drying and highly breathable baselayer with 20-UPF sun protection.

    As Low as:
    $34.30
  • Designed to be worn for cold weather aerobic activities, this is one of the hardest working baselayer tops on the market. Offering the Merino wool breathability, it's an ideal top for winter running or Nordic/skate skiing.

    Our Price:
    $72.00
  • This Zip T features a 14" front zipper and a drop tail bottom hem for increased coverage and easier tuckability. Contoured sleeve cuff keeps sleeves in place while flatlock seams eliminate chafing.

    As Low as:
    $38.00
  • A must-have midlayer piece, essential for keeping your core warm in cool weather. The Men's PHD Hyfi offers you breathability with no bulk, and pulls away unwanted moisture and heat from your body.

    Our Price:
    $90.00
  • A layering piece designed like a second skin. The Stretch Thermal offers lightweight warmth and unsurpassed mobility in a soft, stretchable fleece.

    Our Price:
    $90.00
  • SL728 - Great as a baselayer in cooler conditions, or by itself when it heats up. Made from Smartwools lightest NTS fabric, this crew was designed with flatlock seam construction to eliminate chafing.

    Our Price:
    $52.50
  • Smartwool's best selling, and warmest, baselayer, just got a little more refined with an improved fit, chafe-free seam construction and panels that offer more comfort with a pack.

    Our Price:
    $80.00
  • Smartwool's warmest baselayer just got a little more refined with an improved fit, chaf-free seam construction and panels that offer more comfort with a pack. The perfect baslayer crew just got even better.

    Our Price:
    $57.00
  • The perfect long underwear that will keep you warm when you need it the most. Just remember, these aren't your daddy's long john's

    As Low as:
    $57.00
  • A network of tiny chambers within its fabric spreads moisture over a greater surface area for faster evaporation and a smoother, drier feel than other wicking systems. Wick.Q EVAP makes this UPF 50 hiking/trekking shirt an elite performer.

    Our Price:
    $25.00
  • These performance all-day briefs are the perfect combination of comfort and technology, featuring ergonomically wrapped seams with slight compression for comfort and support. Wear them to ensure that you make it through hot grueling temps.

    Our Price:
    $17.50
  • Light and soft against your skin, this innovative tee protects you from the sun while dispersing heat and moisture. It also boasts Omni-Freeze technology, which reacts with sweat to lower the temperature of the material.

    Our Price:
    $32.50
  • It's no secret that plenty of guys are rocking compression shorts under their board shorts. UA went a step further and added an interface so these compression shorts will attach to your UA board shorts and won't ride up or get pulled down.

    Our Price:
    $27.99
  • The Men's Stretch Thermal Tights are an essential baselayer for the coldest winter months. With flat-lock seams to eliminate chafe, the Thermal Tights are sure to be one of the most comfortable baselayers you own.

    Our Price:
    $32.00
  • The perfect cold-weather, all-day hunting baselayer. With space-age technology to keep you warm and camo colors to keep you out of sight.

    As Low as:
    $30.00
  • The Woolies 220 is an excellent form-fit, baselayer made with 100% Merino Wool; ideal for layering or wearing on its own.

    Our Price:
    $66.50
  • Made with soft, 18.5-micron 100% Merino Wool, the Indie is great as a midweight baselayer or midlayer.

    Our Price:
    $57.00
  • Made with soft, 18.5-micron 100% Merino Wool, the Indie is great as a midweight baselayer or midlayer for those cold winter adventures. With a cool dapper stripe, surely you can wear it out with friends!

    Our Price:
    $66.00
  • Ibex's warmest Merino Wool baselayer is suitable for the coldest of temperatures when you're off in the midst of your winter adventures. Soft, comfortable, and naturally odor-resistant, the Zepher Turtle Neck is a a winter must-have.

    Our Price:
    $66.00
See Trekt Reviews at Bizrate.com