Base Layer Tops

Discover our Base Layer Tops collection, designed to provide essential comfort and moisture-wicking performance for any outdoor adventure. Ideal for layering under jackets or on their own, our tops keep you warm and dry in all conditions. Find your perfect base layer.

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ICEBREAKER
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Women's)
$190.00
S M L XL
JET HEATHER-BLACK
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Women's)
 BAJA
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Women's)
Quick buy
ICEBREAKER
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Men's)
$190.00
M L XL
BRILLIANT-BAJA
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Men's)
 PORT-BLAZE
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Men's)
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Women's)
$140.00
M L XL
BLACK
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Women's)
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's)
$140.00
M L XL
MIDNIGHT NAVY
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's)
 BLACK
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's)
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve V Neck Thermal Top (Women's)
$130.00
S M L XL
BLACK
Merino 200 Oasis Long Sleeve V Neck Thermal Top (Women's)
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Crewe Thermal Top Ruapehu Round (Men's)
$140.00
S M L
BRILLIANT
Merino 200 Oasis Long Sleeve Crewe Thermal Top Ruapehu Round (Men's)
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Crewe Thermal Top Remarkables (Men's)
$140.00
S M L XL
BLACK
Merino 200 Oasis Long Sleeve Crewe Thermal Top Remarkables (Men's)
Quick buy
ICEBREAKER
Merino 260 Tech Long Sleeve Turtleneck Thermal Top (Men's)
$160.00
S M L XL
BLACK
Merino 260 Tech Long Sleeve Turtleneck Thermal Top (Men's)
Quick buy
SMARTWOOL
Intraknit Thermal Merino Base Layer Colorblock 1/4 Zip (Women's) - SW002837
$170.00
S M L XL
DEEP NAVY
Intraknit Thermal Merino Base Layer Colorblock 1/4 Zip (Women's) - SW002837
Quick buy
ARC'TERYX
Rho LT Zip Neck (Men's)
$140.00
M L XL XXL
BLACK SAPPHIRE
Rho LT Zip Neck (Men's)
Quick buy
ARC'TERYX
Rho Zip Neck (Women's)
$140.00
S M L XL
BLACK
Rho Zip Neck (Women's)
 STRATUS
Rho Zip Neck (Women's)
Quick buy
ICEBREAKER
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's)
$150.00
S M L XL
JET HEATHER-BLACK
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's)
 TANG-PRALINE
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's)
 DECO-ASHEN
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's)
Quick buy
ICEBREAKER
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's)
$150.00
S M L XL
BAJA-BRILLIANT
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's)
 CLOUD RAY-HYPER
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's)
 JET HEATHER-BLACK
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's)
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Women's) - SW016905
$120.00
XS S M L XL
EGGPLANT
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Women's) - SW016905
 TWILIGHT BLUE
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Women's) - SW016905
Quick buy
SWIX
RaceX Dry Half Zip (Men's)
$90.00
M L XL
BLACK-PHANTOM
RaceX Dry Half Zip (Men's)
Quick buy
SWIX
RaceX Dry Half Zip (Women's)
$90.00
S M L
DUSTY PURPLE - LIGHT PURPLE
RaceX Dry Half Zip (Women's)
Quick buy
SWIX
RaceX Classic Wind Half Zip (Men's)
$85.00
M L XL
BLACK
RaceX Classic Wind Half Zip (Men's)
Quick buy
SWIX
RaceX Classic Half Zip (Men's)
$80.00
S M L XL
BLACK - PHANTOM
RaceX Classic Half Zip (Men's)
 DARK NAVY - BRIGHT WHITE
RaceX Classic Half Zip (Men's)
Quick buy
SWIX
RaceX Classic Half Zip (Women's)
$80.00
XS S M L
DARK NAVY - LAKE BLUE
RaceX Classic Half Zip (Women's)
 DUSTY PURPLE - LIGHT PURPLE
RaceX Classic Half Zip (Women's)
Quick buy
SWIX
RaceX Classic Long Sleeve (Men's)
$70.00
M L XL
BLACK
RaceX Classic Long Sleeve (Men's)
 COBALT
RaceX Classic Long Sleeve (Men's)
Quick buy
SWIX
RaceX Classic Long Sleeve (Women's)
$70.00
S M L
OLIVE-BRIGHT WHITE
RaceX Classic Long Sleeve (Women's)
 COBALT
RaceX Classic Long Sleeve (Women's)
Quick buy
SMARTWOOL
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
From $98.00 $160.00
Sale
S M L
SERENE BLUE-WHITE
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
 CASCADE GREEN-APRICO
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
 PECAN BROWN - DEEP NAVY
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Crew Plus Boxed (Women's) - SW016803
$140.00
1X 2X 3X 4X
CHARCOAL HEATHER
Classic Thermal Merino Base Layer Crew Plus Boxed (Women's) - SW016803
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Colorblock Crew Boxed (Men's) - SW016354
$90.00 $140.00
Sale
S M L XL
PEWTER BLUE HEATHER
Classic Thermal Merino Base Layer Colorblock Crew Boxed (Men's) - SW016354
 CHARCOAL-ARG PURPLE
Classic Thermal Merino Base Layer Colorblock Crew Boxed (Men's) - SW016354
 BLACK-WINTER MOSS
Classic Thermal Merino Base Layer Colorblock Crew Boxed (Men's) - SW016354
Quick buy
RAB
Conduit Hoody (Women's)
$115.00
8 10 12 14 16
BELUGA
Conduit Hoody (Women's)
 PATROIT BLUE
Conduit Hoody (Women's)
Quick buy
RAB
Conduit Pull-On (Women's)
$105.00
8 10 12 14
ULTRAMARINE
Conduit Pull-On (Women's)
 DEEP HEATHER
Conduit Pull-On (Women's)
Quick buy
RAB
Conduit Pull-On (Men's)
$105.00
M L XL
INK
Conduit Pull-On (Men's)
 LIGHT KHAKI
Conduit Pull-On (Men's)
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer 1/4 Zip (Men's)
$120.00
S M L XL XXL
BLACK
Classic All-Season Merino Base Layer 1/4 Zip (Men's)
 TWILIGHT BLUE
Classic All-Season Merino Base Layer 1/4 Zip (Men's)
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer Long Sleeve Boxed Plus (Women's) - SW016915
$115.00
1X 2X 3X
TWILIGHT BLUE
Classic All-Season Merino Base Layer Long Sleeve Boxed Plus (Women's) - SW016915
Quick buy
ICEBREAKER
Merino Sphere II Long Sleeve T-Shirt (Women's)
$100.00
S M L
BLACK
Merino Sphere II Long Sleeve T-Shirt (Women's)
 GO BERRY HEATHER
Merino Sphere II Long Sleeve T-Shirt (Women's)
Quick buy
ICEBREAKER
Merino Sphere II Short Sleeve T-Shirt (Women's)
$90.00
S M L
GREEN GLORY HEATHER
Merino Sphere II Short Sleeve T-Shirt (Women's)
 VIBRANT EARTH HEATHE
Merino Sphere II Short Sleeve T-Shirt (Women's)
Quick buy
SMARTWOOL
Intraknit Active Base Layer Long Sleeve (Men's) - SW012790
From