Base Layer BottomsUnderwear BottomsUnderwear Tops

Men's Base Layer Tops.

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41 products
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THE NORTH FACE
Alpine Polartec 100 Crew (Men's)
$94.99
SMLXL
TNF BLACK
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SWIX
RaceX Dry Half Zip (Men's)
$90.00
MLXL
BLACK-PHANTOM
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SWIX
RaceX Classic Wind Half Zip (Men's)
$85.00
MLXL
BLACK
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SWIX
RaceX Classic Half Zip (Men's)
$80.00
SMLXL
BLACK - PHANTOMDARK NAVY - BRIGHT WHITE
Left Right Quick buy
SWIX
RaceX Classic Long Sleeve (Men's)
$70.00
MLXL
BLACKCOBALT
29% off
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SMARTWOOL
Intraknit Merino Tech 1/4 Zip (Men's) - SW016670
Select Styles $150.00 $210.00 Sale
MLXL
BLACK-CHARCOALDEEP NAVY-FOX BROWN
36% off
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SMARTWOOL
Classic Thermal Merino Base Layer Colorblock Crew Boxed (Men's) - SW016354
$90.00 $140.00 Sale
SMLXL
PEWTER BLUE HEATHERCHARCOAL-ARG PURPLEBLACK-WINTER MOSS
20% off
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RAB
Conduit Pull-On (Men's)
$84.00 $105.00 Sale
MLXL
INKLIGHT KHAKI
Left Right Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer 1/4 Zip (Men's)
$120.00
SMLXLXXL
BLACKTWILIGHT BLUE
37% off
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SMARTWOOL
Intraknit Active Base Layer Long Sleeve (Men's) - SW012790
Select Styles $85.00 $135.00 Sale
MLXL
BLACKLEAD
36% off
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SMARTWOOL
Classic Thermal Merino Base Layer Pattern Crew Boxed (Men's)
Select Styles $90.00 $140.00 Sale
SMLXL
BLACK MOUNTAIN SCAPE
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SMARTWOOL
Classic All-Season Merino Base Layer Long Sleeve Boxed (Men's) - SW016953
$115.00
SMLXLXXL
BLACKFERN GREENLAGUNA BLUE-DEEP NAVYIRON HEATHER+ 1 more
26% off
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SMARTWOOL
Classic All-Season Plant-Based-Dye Merino Base Layer Long-Sleeve Boxed (Men's) - SW016955
Select Styles $85.00 $115.00 Sale
MLXL
INDIGO BLUE
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ICEBREAKER
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's)
$135.00
MLXLS
BLACKLODEN
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BONNETIER
Techcrew Top - Mid Layer (Men's)
$135.00
MLXLS
OLIVEBLACKHEATHER BLUEHEATHER GREYHEATHER BLUE-DESCENT+ 2 more
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ARC'TERYX
Rho LT Zip Neck (Men's)
$140.00
SMLXL2XL
BLACKBLACK SAPPHIRE

1 review
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ARC'TERYX
Rho Heavyweight Zip Neck (Men's)
$190.00
SMLXL2XL
BLACK SAPPHIREBLACK
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EXOFFICIO
Give-N-Go® 2.0 Crew Neck Tee (Men's)
$49.99
SMLXL
BLACKSTEEL ONYXWHITE
40% off
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ICEBREAKER
Merino Sphere II Long Sleeve T-Shirt (Men's)
Select Styles $60.00 $100.00 Sale
SMLXL2XL
BLACKMETRO HEATHERVIBRANT EARTH HEATHEGREEN GLORY HEATHER+ 1 more
 Quick buy
SWIX
RaceX BodyW Long Sleeve (Men's)
$70.00
MLXL2XL
GREY MELANGE
 Quick buy
SWIX
RaceX Bodyw Half Zip (Men's)
$75.00
LXLM
BLUE SEA
40% off
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WOOLPOWER
Crewneck 200 Long Sleeve (Unisex)
$81.75 $136.25 Sale
XSSMLXL2XL
PINE GREENGREYBLACK
25% off
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SMARTWOOL
Intraknit™ Thermal Merino Base Layer Colorblock Crew (Men's) - SW016453
Select Styles $120.00 $160.00 Sale
SMLXL
CHARCOAL-HONEY GOLD
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ICEBREAKER
Merino 260 Tech Long Sleeve Half Zip Thermal Top (Men's)
$155.00
SMLXL2XL
BLACKGRITSTONE HEATHER
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ICEBREAKER
Merino 260 Tech Long Sleeve Crewe Thermal Top (Men's)
$145.00
SMLXL2XL3XL
GRITSTONEBLACK
42% off
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ICEBREAKER
BodyfitZone™ Merino 260 Zone Long Sleeve Half Zip Thermal Top (Men's) - Past Season
Select Styles $98.00 $170.00 Sale
LXLS2XL
JET HTHR-BLACK
Left Right Quick buy
ICEBREAKER
Merino 175 Everyday Long Sleeve Crewe Thermal Top (Men's)
$95.00
MLXL
BLACK
53% off
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ICEBREAKER
Merino Anatomica Short Sleeve Crewe T-Shirt (Men's)
Select Styles $40.00 $85.00 Sale
SMLXL2XL
MIDNIGHT NAVYBLACK-MONSOONBLACKJET-BLACK+ 1 more
36% off
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SMARTWOOL
Classic Thermal Merino Base Layer Crew Boxed (Men's) - SW016350
Select Styles $90.00 $140.00 Sale
SMLXL2XL
BLACK COLOUR SHIFTBLACKLIGHT GRAY HEATHERACORN HEATHERNEPTUNE BLUE HEATHERDEEP NAVY COLOUR SHIFTHONEY GOLD+ 4 more
Left Right Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Crewe Thermal Top (Men's)
$125.00
SMLXL2XL3XL
GRITSTONE HEATHERMIDNIGHT NAVYBLACK
Left Right Quick buy
SWIX
RaceX BodyW Halfzip Wind (Men's)
$80.00
SMLXL
Left Right Quick buy
SMARTWOOL
Intraknit Thermal Merino Base Layer 1/4 Zip (Men's) - SW016260
$170.00
SMLXL2XL
BLACK-WHITE
Left Right Quick buy
SMARTWOOL
Intraknit Thermal Merino Base Layer Crew (Men's) - SW019286
$160.00
SMLXL2XL
BLACK-WHITE
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ARC'TERYX
Rho LT Crew Neck (Men's)
$120.00 Sold Out
ML
PYTHEAS-BLUE TETRA
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ICEBREAKER
Merino Central Classic Short Sleeve T-Shirt (Men's)
$80.00 Sold Out
MLXL
LODEN
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ICEBREAKER
Merino Tech Lite II Short Sleeve T-Shirt Skiing Yeti (Men's)
$100.00 Sold Out
MLXL
LAZURITE
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ICEBREAKER
200 Oasis Long Sleeve Crewe Baselayer Top (Men's)
$130.00 Sold Out
MLXL
CLOVEMIDNIGHT NAVY
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ICEBREAKER
Merino Wave Long Sleeve Stripe T-Shirt (Men's)
$110.00 Sold Out
SML
MIDNIGHT NAVY-GRAPE
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SMARTWOOL
Merino Sport Ultralite Mountain Bike ¾ Sleeve Tee (Men's)
$100.00 Sold Out
LXL
PICANTE
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SMARTWOOL
Ultralite Mountain Bike Short Sleeve Tee (Men's) - SW016552
$90.00 Sold Out
MLXL
SAGE HEATHER
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ICEBREAKER
Merino Original Long Sleeve Half Zip Top (Men's)
$220.00 Sold Out
MLXL
BLACK