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Men's Baselayers & Underwear

209 Products

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  • A year-round, next-to-skin baselayer made with 100% Merino Wool; designed for wear under your shell pants or alone as loungewear.

    Our Price:
    $70.00
  • A year-round, next-to-skin baselayer made with 100% Merino Wool; perfect for cool days when summer starts to turn into fall, and a heat-venting zipper keeps you cool when you warm up.

    As Low as:
    $51.00
  • 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:
    $35.40
  • Patagonia's most breathable synthetic baselayer keeps you dry and comfortable in cool conditions - with a 1/4 zipper for ventilation.

    Our Price:
    $34.30
  • Patagonia's most breathable synthetic baselayer keeps you dry and comfortable in cool conditions.

    Our Price:
    $31.50
  • 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:
    $52.50
  • 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
  • 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.

    As Low as:
    $36.00
  • ExOfficio's greatest product is the last pair of underwear you'll ever want to wear. The Men's Give-N-Go comes with odor resistant and lightweight properties. You'll wonder where they've been your whole life.

    As Low as:
    $20.80
  • The simple, yet technically advanced, Men's Peachskins Crewneck is extremely light and comfy on the body. With moisture wicking properties to pull sweat away from the core, you'll love the dry cozy feel of this crewneck baselayer.

    Our Price:
    $31.50
  • Mountain Hardwear's classic wicking tee shirt is re-engineered and re-designed to provide even more comfort and wicking power.

    As Low as:
    $24.50
  • Designed with the team player in mind, this short sleeve T-shirt uses UA Tech fabric to provide cool, dry performance and superior comfort. On-field or off, get the performance you demand when you're at the height of activity.

    Our Price:
    $22.99
  • 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
  • These cozy leggings are an active base layer made from 200gm merino fabric for cool conditions. Features include a convenient functioning front fly, smooth flatlock seams to prevent rubbing and a slim fit for prolonged comfort.

    Our Price:
    $54.00
  • This latest UA fabric wears like a second skin so you get the same powerful compression, plus extreme comfort for all-day wear. Designed to pull moisture away from the core, it ensures that you'll stay cool and comfortable.

    Our Price:
    $24.99
  • ExOfficio's greatest product is the last pair of underwear you'll ever want to wear. The Men's Give-N-Go Comes with odor resistant and lightweight properties. You'll wonder where they've been your whole life.

    Our Price:
    $26.00
  • 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
  • Join the thousands of people who have discovered the ExOfficio travel underwear revolution. Just toss your Give-N-Go's in the laundry or wash them in a sink. Within hours you will have a fresh, dry pair of underwear.

    Our Price:
    $20.00
  • 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:
    $29.00
  • A best-selling baselayer designed to keep you warm and dry when the temperature really plummets.

    Our Price:
    $90.00
See Trekt Reviews at Bizrate.com