Base Layer BottomsBase Layer TopsUnderwear BottomsUnderwear Tops

Women's Base Layers & Underwear.

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121 products
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New in
Left Right Quick buy
SMARTWOOL
Intraknit Thermal Merino Base Layer Pattern Crew (Women's)
$160.00
SML
PECAN BROWN - DEEP NAVY
New in
Left Right Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Crew Plus Boxed (Women's) - SW016803
$140.00
1X2X3X4X
CHARCOAL HEATHER
New in
Left Right Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Crew (Women's) - SW016369
$140.00
ML
BLACK CHERRY HEATHER
Left Right Quick buy
SMARTWOOL
Intraknit Bikini - Boxed (Women's)
$45.00
SML
BLACK
Left Right Quick buy
PATAGONIA
Active Hipster (Women's)
$29.00
XSSMLXL
MEINERS STRIPE: LAGO BLUEBLACK
Left Right Quick buy
SMARTWOOL
Merino Lace Thong Boxed (Women's) - SW016620
$40.00
XSSMLXL
BLACK
Left Right Quick buy
SMARTWOOL
Intraknit Crop Bra (Women's) - SW016848
$90.00
XSSML
BLACK HEATHERSANDSTONE
Left Right Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer Long Sleeve Boxed Plus (Women's) - SW016915
$115.00
1X2X3X
TWILIGHT BLUE
Left Right Quick buy
ICEBREAKER
Merino Siren Padded Bra (Women's)
$60.00
SML
BLACKLODEN
Left Right Quick buy
ICEBREAKER
Merino Sphere II Short Sleeve Scoop T-Shirt (Women's)
$90.00
XSSML
FRESH HEATHERGO BERRY HEATHER
Left Right Quick buy
ICEBREAKER
Merino Sphere II Long Sleeve T-Shirt (Women's)
$100.00
SML
BLACKGO BERRY HEATHER
Left Right Quick buy
ICEBREAKER
Merino Sphere II Short Sleeve T-Shirt (Women's)
$90.00
SML
GREEN GLORY HEATHERVIBRANT EARTH HEATHE
Left Right Quick buy
ICEBREAKER
Merino Siren Bra Cami Singlet (Women's)
$90.00
SML
BLACK
43% off
Left Right Quick buy
ARC'TERYX
Essent Bra (Women's)
Starting at $40.00 $70.00 Sale
4681012
BLACKSERENESOLASTA
Left Right Quick buy
ARC'TERYX
Soria Long Line Bra (Women's)
$80.00
681012
BLACKFORAGE
Left Right Quick buy
SMARTWOOL
Intraknit™ Strappy Bra (Women's) - SW016846
$85.00
XSSML
BLACK HEATHERSANDSTONE
Left Right Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Pattern 1/4 Zip Plus Boxed (Women's)
$150.00
1X2X3X
BLACK DOT
Left Right Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer 1/4 Zip Plus Boxed (Women's)
$150.00
1X2X3X
BLACK CHERRY HEATHER
Left Right Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Bottom Plus Boxed (Women's)
$140.00
1X2X3X4X
BLACK CHERRY HEATHERBLUEBERRY HILL HEATH
Left Right Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Pattern Crew Plus Boxed (Women's)
$140.00
1X2X3X
BLACK DOT
Left Right Quick buy
SMARTWOOL
Merino Bikini Boxed (Women's) - SW016925
$40.00
XSSMLXL
BLACKTWILIGHT BLUE
Left Right Quick buy
SMARTWOOL
Intraknit Racerback Bra (Women's) - SW016847
$80.00
XSSMLXL
BLACK HEATHERALMONDULTRA VIOLETSANDSTONE+ 1 more
Left Right Quick buy
SMARTWOOL
Classic All Season Merino Long Sleeve Boxed (Women's) - SW016913
$115.00
XSSMLXL
BLACKTWILIGHT BLUE
Left Right Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer Bottom Boxed Plus (Women's) - SW016911
$110.00
1X2X3X
BLACK
Left Right Quick buy
SMARTWOOL
Classic All-Season Merino Lace Base Layer Bottom Boxed (Women's) - SW016625
$105.00
XSSMLXL
BLACK
Left Right Quick buy
SWIX
RaceX Bodywear 1/2 Zip (Women's)
$75.00
MLXL
BLUE SEADARK NAVY
Power Stretch Pro Pull-On (Women's) Deep Ink QFE-63
Quick buy
RAB
Power Stretch Pro Pull-On (Women's)
$175.00
810121416
DEEP INK
Left Right Quick buy
SMARTWOOL
Seamless Hipster (Women's) - Past Season
$45.00
SML
BLACK
Left Right Quick buy
SMARTWOOL
Seamless Bikini (Women's) - Past Season
$45.00
XSSMLXL
BLACK
Left Right Quick buy
BONNETIER
Basic Luxe (Women's)
$135.00
XSSML
CHERRY-FERNCHERRY-BEARSUN-MOUNTAINSBURNT ORANGE-PINE+ 1 more
35% off
Left Right Quick buy
ICEBREAKER
260 Zone LS Half Zip (Women's) - Past Season
Starting at $110.00 $170.00 Sale
XSSMLXL
JET HTHR-BLACK
Left Right Quick buy
ICEBREAKER
260 Tech LS Crewe (Women's)
$145.00
XSSMLXL
BLACK
Left Right Quick buy
VUORI
Stride Bra (Women's)
$80.00
SMLXL
DARK LUNA
25% off
Left Right Quick buy
SMARTWOOL
Intraknit™ Thermal Merino Base Layer Crew (Women's) - SW019284
Starting at $120.00 $160.00 Sale
SMLXL
BLACK CHERRY - VIOLETBLACK - WHITEBLACK CHERRY
Left Right Quick buy
SMARTWOOL
Intraknit™ Thermal Merino Base Layer 3/4 Bottom (Women's) - SW016826
$140.00
SML
BLACK-WHITE
20% off
Left Right Quick buy
SMARTWOOL
Intraknit™ Thermal Merino Base Layer Bottom (Women's) - SW016828
Starting at $120.00 $150.00 Sale
XSSMLXL
BLACK-WHITEBLUEBERRY HILL
21% off
Left Right Quick buy
SMARTWOOL
Intraknit™ Merino Tech 1/4 Zip (Women's) - SW016706
Starting at $150.00 $190.00 Sale
SML
BLACK CHERRYNORTH WOODS
25% off
Left Right Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Pattern Bottom Boxed (Women's) - Past Season
$98.00 $130.00 Sale
SMLXLXS
BLUEBERRY HILL MARBLBLACK DOT
21% off
Left Right Quick buy
ARC'TERYX
RHO LT Zip Neck (Women's)
Starting at $110.00 $140.00 Sale
XSSMLXL2XL
BLACKHABITATMOONLIT
25% off
Left Right Quick buy
ARC'TERYX
Rho LT LS Crew (Women's)
Starting at $90.00 $120.00 Sale
XSSMLXL2XL
BLACKBLACK SAPPHIRE-MOONL
18% off
Left Right Quick buy
ARC'TERYX
Rho LT Bottom (Women's)
$90.00 $110.00 Sale
XSSMLXL2XL
BLACKBLACK SAPPHIRE-MOONL
41% off
Left Right Quick buy
ICEBREAKER
Merino Siren Tank Top (Women's)
Starting at $50.00 $85.00 Sale
XSSMLXL
BLACK
Left Right Quick buy
EXOFFICIO
Give-N-Go® 2.0 Sport Thong (Women's)
$24.99
SML
BLACKISLAND LIFE-SWEET
30% off
Left Right Quick buy
SMARTWOOL
Merino Sport Ultralite Mountain Bike 3/4 Sleeve Tee (Women's)
Starting at $70.00 $100.00 Sale
SMLXL
MANGO SORBET HEATHERTWILIGHT BLUE
31% off
Left Right Quick buy
SMARTWOOL
Merino Sport 150 Tank (Women's)
Starting at $45.00 $65.00 Sale
MLSXS
BLACKLIGHT MAHOGANY HEATHOCEAN SPRAY+ 1 more
31% off
Left Right Quick buy
SMARTWOOL
Merino Sport Ultralite Racerback Tank (Women's)
Starting at $45.00 $65.00 Sale
XSSML
FIJI FLOWER HEATHERMANGO SORBET HEATHERTWILIGHT BLUE
33% off
Left Right Quick buy
SMARTWOOL
Merino Sport Crankset Short Sleeve Graphic Tee (Women's) - Past Season
$50.00 $75.00 Sale
SM
MANGO SORBET
56% off
Quick buy
SUGOI
Midzero Bun Toaster (Women's) - Past Season
Starting at $20.00 $44.99 Sale
XSSMLXL