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Women's base layers and underwear

Showing 103 results
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  1. NEW

    Mons Royale

    Bella Merino Air-Con Long Sleeve Hood - Women's

    $159.95
    (0)

    Smartwool

    Classic Thermal Merino Base Layer Bottom - Women's

    $149.95
    4.2
  3. NEW

    MEC

    T3 Merino Base Layer Long Sleeve Top - Women's

    $139.95
    (0)
    Member Price Available
  4. NEW

    MEC

    T2 Merino Base Layer Long Sleeve Top - Women's

    $129.95
    (0)
    Member Price Available

    Kari Traa

    Rose Hood - Women's

    $169.95
    4

    Fjallraven

    Abisko Lite Fleece Half Zip - Women's

    $164.95
    4

    Kari Traa

    Smekker High Waist Pants - Women's

    $159.95
    5

    Kari Traa

    Smekker Long Sleeve Crew - Women's

    $159.95
    4.3

    Smartwool

    Classic Thermal Merino Base Layer Crew - Women's

    $149.95
    4.7

    Kari Traa

    Rose High Waist Pants - Women's

    $149.95
    3.2
  11. NEW

    MEC

    T3 Merino Base Layer Bottoms - Women's

    $139.95
    (0)
    Member Price Available

    Janji

    Pinnacle RD Ultra Bra - Women's

    $111.95
    (0)

    Fjallraven

    Abisko Tights - Women's

    $169.95
    4.2

    Smartwool

    Classic Thermal Merino Base Layer 1/4 Zip - Women's

    $159.95
    5

    Vuori

    Chilled Out Legging - Women's

    $140.76$175.95
    20% off
    (0)
  18. NEW

    icebreaker

    Merino 200 Oasis Long Sleeve Crewe - Women's

    $144.95
    4.8
  19. NEW

    Mountain Hardwear

    AirMesh Long Sleeve Hoodie - Women's

    $129.95
    5

    La Sportiva

    Cosmosis Legging - Women's

    $109.95
    5

    Patagonia

    Shadowlite High Impact Adjustable Bra - Women's

    $109.00
    (0)
  22. NEW

    MEC

    T2 Merino Base Layer Bottoms - Women's

    $129.95
    (0)
    Member Price Available

    Janji

    Ascend Sports Bra - Women's

    $117.95
    (0)

    Smartwool

    IntraKnit All-Season Merino Baselayer Bottom - Women's

    $164.95
    4

    Kari Traa

    Smekker Half-Zip Baselayer Top - Women's

    $169.95
    (0)

    Smartwool

    Intraknit All-Season Merino Baselayer Long Sleeve - Women's

    $164.95
    5

    Smartwool

    Classic All-Season Merino Base Layer Bottoms - Women's

    $124.95
    5

    Smartwool

    Classic All-Season Merino Base Layer Crew - Women's

    $129.95
    5

    Kari Traa

    Rose Half Zip Top - Women's

    $159.95
    4.4

    Smartwool

    Intraknit Thermal Merino Base Layer 3/4 Bottoms - Women's

    $139.95
    (0)

    Smartwool

    Classic Thermal Merino Base Layer 1/4 Zip - Women's

    $159.95
    (0)
  32. NEW

    Odlo

    Seamless Performance Wool Bottom - Women's

    $179.95
    (0)

    Vuori

    V1 Run Bra - Women's

    $109.95
    (0)
  34. NEW

    MEC

    T1 Merino Base Layer Long Sleeve Top - Women's

    $109.95
    (0)
    Member Price Available

    Smartwool

    Intraknit Hipster - Women's

    $58.95
    5

    Janji

    Long Bra - Women's

    $97.95
    (0)

    Patagonia

    Live Simply Bra - Women's

    $69.00
    4.8

    MEC

    T3 Merino Base Layer 1/4 Zip Long Sleeve Top - Women's

    $64.94$129.95
    50% off
    5

    MEC

    T2 Merino Base Layer Long Sleeve Top - Women's

    $54.94$109.95
    50% off
    3.1

    MEC

    T1 Merino Base Layer Bottom - Women's

    $109.95
    (0)
    Member Price Available

    Salomon

    SHKout Core Tights 28in - Women's

    $65.97$109.95
    40% off
    5

    Vuori

    AllTheForm Bra - Women's

    $87.95
    (0)

    Vuori

    Elevation Racer Bra - Women's

    $65.96$87.95
    25% off
    (0)

    icebreaker

    Siren Bra - Women's

    $59.95
    4.1

    Craft

    Core Dry Active Comfort LS - Women's

    $56.21$74.95
    25% off
    (0)

    La Sportiva

    Cosmosis Bra Tank - Women's

    $55.96$79.95
    30% off
    5

    Smartwool

    Intraknit Bikini - Women's

    $51.95
    (0)

    Kombi

    MerinoMix Active Long Bottom - Women's

    $74.95
    (0)

    Kombi

    RedHEAT Active Long Bottoms - Women's

    $69.95
    5

Compare products (0)

Comfy all season

The underrated heroes of outdoor clothing? Base layers and underwear. A comfy next-to-skin layer made of materials such as moisture-wicking polyester or itch-free merino wool can keep you warm without overheating while you’re skiing, hiking, trail running, snowshoeing or camping.

If you’re new to the idea of a layering system, check out our article on how to layer for outdoor activities. MEC has a big range of base layers to choose from for getting outside while staying comfy, including brands like Smartwool, Kari Traa and own in-house MEC Label brand.

Layer up: merino vs. synthetic

When it comes to knowing how to choose base layers and underwear, it largely depends on the activities you’ll be doing, as well as the amount of warmth you’re looking for.

Synthetic base layers (often polyester) wick sweat, are durable, and dry quickly. Merino wool base layers are made from a natural fabric that moves and stretches with your body; it’s also naturally antimicrobial, which reduces odors if you’re wearing them for multiple days at a time. To get benefits from both, a merino-synthetic blend is a great option.