• Toll-Free: 877-300-1544
  • Cart: 0 item
    RECENTLY ADDED:
    Subtotal:
  • Checkout
ms-landing.png
NEW CUSTOMERS  - SAVE 15% - USE CODE: NEW2TREKT. EXCLUDES SELECT BRANDS/ITEMS.

Men's Baselayers & Underwear

107 Products

Items per Page:
View as:
  • Patagonia's most versatile synthetic baselayer keeps you dry and warm in cool to cold conditions.

    Our Price:
    $29.40
  • Patagonia's most versatile synthetic baselayer keeps you dry and warm in cool to cold conditions - with a 1/4 zipper for ventilation.

    As Low as:
    $29.50
  • 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
  • The ultimate foundation for smart layering is the SmartWool boxer brief for men. It features a smooth elastic waistband and internal flatlock seams for exceptional smoothness and comfort.

    As Low as:
    $38.40
  • Great as a baselayer in cooler conditions, or by itself when it heats up. Smartwool's Microweight Crew is a must have for any outdoorsman.

    Our Price:
    $26.25
  • Smartwool's Microweight bottom has a great weight, sharp looking design and fits like a dream. The Men's Microweight Bottom takes the term long underwear to a whole other level.

    As Low as:
    $60.00
  • 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.

    As Low as:
    $71.25
  • The Midweight Zip T is a perfect baselayer for cold weather adventures. Made of outstanding merino wool, you're going to love the moisture wicking properties and antimicrobial fibers. Soft on skin, you're dream baselayer has finally arrived.

    As Low as:
    $78.75
  • 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:
    $76.00
  • 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:
    $140.00
  • 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
  • The Oasis Long Sleeve Crewe is an active base layer made from Bodyfit 200 merino fabric to keep your body at the perfect temperature when you're hiking or exploring the outdoors. Complete with offset shoulder seams to prevent chafing.

    Our Price:
    $54.00
  • 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:
    $30.00
  • 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:
    $66.50
  • 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:
    $48.00
  • The tried-and-true Silkweight boxer brief underwear is lightweight silky polyester that provides for all-day, next-to-skin comfort. Wear them when taking long hiking trips or wear them around town for casual use.

    Our Price:
    $20.30
  • 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:
    $50.00
  • 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:
    $21.00
  • The Shak Full Zip is an outstanding midlayer or standalone. Made of 100% merino wool, it pulls moisture away from the body and natural odor control keeps you smelling fresh after a long day of adventuring. It's great for technical use and casual nights ou

    Our Price:
    $115.50
  • A best-selling baselayer designed to keep you warm and dry when the temperature really plummets.

    Our Price:
    $90.00
  • The highly versatile Drive is made with 200g/m merino fabric plus nanotechnology to keep you dry while you're running or working out. A zip collared neck lets you control your temperature so you stay comfortable throughout activity.

    Our Price:
    $84.00
  • SL520 - Designed to be worn for cool weather aerobic activities, this is one of the hardest working baselayer tops on the market offering the unique combination of Merino breathability with a windproof 1CFM rating.

    Our Price:
    $84.00
See Trekt Reviews at Bizrate.com