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Women's base layers and underwear

Showing 97 results
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    Smartwool

    Classic Thermal Merino Base Layer Bottom - Women's

    $149.95
    4.3

    Smartwool

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

    $159.95
    5

    Mons Royale

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

    $159.95
    (0)
  5. NEW

    MEC

    T2 Merino Base Layer Bottoms - Women's

    $129.95
    (0)
    Member Price Available

    MEC

    T2 Merino Base Layer Long Sleeve Top - Women's

    $129.95
    (0)
    Member Price Available

    Smartwool

    Classic Thermal Merino Base Layer Crew - Women's

    $149.95
    4.8
  8. NEW

    Arc'teryx

    Rho Crew - Women's

    $130.00
    4.5

    Vuori

    Chilled Out Legging - Women's

    $140.76$175.95
    20% off
    (0)

    Kari Traa

    Smekker High Waist Pants - Women's

    $159.95
    5
  12. NEW

    Janji

    Ascend Sports Bra - Women's

    $117.95
    (0)
  13. NEW

    MEC

    T3 Merino Base Layer Bottoms - Women's

    $139.95
    (0)
    Member Price Available
  14. NEW

    MEC

    T3 Merino Base Layer Long Sleeve Top - Women's

    $139.95
    (0)
    Member Price Available

    Vuori

    V1 Run Bra - Women's

    $109.95
    (0)
  17. NEW

    Mountain Hardwear

    AirMesh Long Sleeve Hoodie - Women's

    $129.95
    5

    La Sportiva

    Cosmosis Legging - Women's

    $109.95
    5

    Fjallraven

    Abisko Lite Fleece Half Zip - Women's

    $164.95
    4.2

    Patagonia

    Shadowlite High Impact Adjustable Bra - Women's

    $109.00
    (0)

    Smartwool

    IntraKnit All-Season Merino Baselayer Bottom - Women's

    $164.95
    4.2

    Kari Traa

    Smekker Half-Zip Baselayer Top - Women's

    $169.95
    (0)

    Janji

    Pinnacle RD Ultra Bra - Women's

    $111.95
    (0)

    Smartwool

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

    $164.95
    4.5

    Kari Traa

    Smekker Long Sleeve Crew - Women's

    $159.95
    4.3

    Smartwool

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

    $124.95
    5

    Kari Traa

    Rose Half Zip Top - Women's

    $159.95
    4.4

    Smartwool

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

    $129.95
    5

    Smartwool

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

    $139.95
    (0)

    Kari Traa

    Rose Hood - Women's

    $169.95
    4.5

    Kari Traa

    Rose High Waist Pants - Women's

    $149.95
    3.2

    Smartwool

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

    $159.95
    (0)
  33. NEW

    Odlo

    Seamless Performance Wool Bottom - Women's

    $179.95
    (0)

    MEC

    T1 Merino Base Layer Bottom - Women's

    $109.95
    (0)
    Member Price Available

    MEC

    T1 Merino Base Layer Long Sleeve Top - Women's

    $109.95
    (0)
    Member Price Available

    MEC

    T3 Merino Base Layer Bottoms - Women's

    $59.94$119.95
    50% off
    3.2

    MEC

    T2 Merino Base Layer Long Sleeve Top - Women's

    $54.94$109.95
    50% off
    3.1

    MEC

    T2 Merino Base Layer Bottoms - Women's

    $54.94$109.95
    50% off
    4.5

    Smartwool

    Intraknit Hipster - Women's

    $58.95
    5

    Kombi

    MerinoMix Active Long Bottom - Women's

    $74.95
    (0)
  47. NEW

    Vuori

    Daily Form Bra - Women's

    $87.95
    (0)

    Kombi

    RedHEAT Active Long Bottoms - Women's

    $69.95
    5
  50. NEW

    Patagonia

    Live Simply Bra - Women's

    $69.00
    4.8

    Smartwool

    Intraknit Bikini - Women's

    $51.95
    (0)

    Vuori

    AllTheForm Bra - Women's

    $87.95
    (0)

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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.