T-ShirtsSweaters & HoodiesShirts & PolosTank TopsVestsDressesJumpsuits & RompersUnderwear TopsJerseys

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.

Filter
80 products
FeaturedBest sellingAlphabetically, A-ZAlphabetically, Z-APrice, low to highPrice, high to lowDate, old to newDate, new to old
Filter
80 products
FeaturedBest sellingAlphabetically, A-ZAlphabetically, Z-APrice, low to highPrice, high to lowDate, old to newDate, new to old
Filters
Out of stock
Gender
Sizes
Brand
Activity
Category
Subcategory
Price
$
$
Sort by
Quick buy
ARC'TERYX
Rho LT Hoody (Men's) - X000009423
$140.00
M L XL
FORAGE
Rho LT Hoody (Men's) - X000009423
Quick buy
ARC'TERYX
Rho Hoody (Women's) - X000007326
$140.00
S M L
BLACK
Rho Hoody (Women's) - X000007326
 STRATUS
Rho Hoody (Women's) - X000007326
Quick buy
ICEBREAKER
Merino 260 Tech Long Sleeve Half Zip Thermal Top (Women's) - IBB04390
$160.00
S M L XL
BLACK
Merino 260 Tech Long Sleeve Half Zip Thermal Top (Women's) - IBB04390
Quick buy
ICEBREAKER
Merino 260 Tech Long Sleeve Half Zip Thermal Top (Men's) - IBB04372
$160.00
S M L XL
BLACK
Merino 260 Tech Long Sleeve Half Zip Thermal Top (Men's) - IBB04372
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer 1/4 Zip Plus Boxed (Women's) - SW002831
$90.00 $150.00
Sale
1X 2X 3X 4X
BLACK DIGI SNOW
Classic Thermal Merino Base Layer 1/4 Zip Plus Boxed (Women's) - SW002831
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Hoodie Boxed (Men's) - SW016360
$180.00
S M L XL
BLACK RETRO LINE
Classic Thermal Merino Base Layer Hoodie Boxed (Men's) - SW016360
 NIVAL BLUE-DEEP NAVY
Classic Thermal Merino Base Layer Hoodie Boxed (Men's) - SW016360
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Men's) - SW002820
$120.00
M L XL XXL
BLACK
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Men's) - SW002820
 IRON HEATHER
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Men's) - SW002820
Quick buy
BULA
Rainbow Set Base Layer (Kids') - KLSRAI3
From $45.00 $65.00
Sale
XS S M L XL
MILITARY GREEN
Rainbow Set Base Layer (Kids') - KLSRAI3
 BLACK
Rainbow Set Base Layer (Kids') - KLSRAI3
 LOTUS BLACK
Rainbow Set Base Layer (Kids') - KLSRAI3
 PINK
Rainbow Set Base Layer (Kids') - KLSRAI3
+ 1 more
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Colorblock 1/4 Zip Boxed (Women's) - SW002833
$90.00 $150.00
Sale
S M L
CURRANT-GARDEN PINK
Classic Thermal Merino Base Layer Colorblock 1/4 Zip Boxed (Women's) - SW002833
 BLACK-CHARCOAL HEATHER
Classic Thermal Merino Base Layer Colorblock 1/4 Zip Boxed (Women's) - SW002833
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer 1/4 Zip Boxed - SW002822
$150.00
S M L XL XXL
NORTH WOODS FOGGY PINES
Classic Thermal Merino Base Layer 1/4 Zip Boxed - SW002822
 CHARCOAL-CURRANT
Classic Thermal Merino Base Layer 1/4 Zip Boxed - SW002822
 BLACK
Classic Thermal Merino Base Layer 1/4 Zip Boxed - SW002822
 DEEP NAVY
Classic Thermal Merino Base Layer 1/4 Zip Boxed - SW002822
+ 1 more
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Colorblock Crew Boxed (Men's) - SW002570
$140.00
S M L XL XXL
CHARCOAL HEATHER-BLACK
Classic Thermal Merino Base Layer Colorblock Crew Boxed (Men's) - SW002570
Quick buy
THE NORTH FACE
Summit Series Pro 120 Crew (Men's) - NF0A87ZT
$129.99
S M L XL XXL
TNF BLACK
Summit Series Pro 120 Crew (Men's) - NF0A87ZT
Quick buy
THE NORTH FACE
Summit Series FUTUREFLEECE™ LT ½-Zip (Men’s) - NF0A5J8R
$184.99
S M L XL
TNF BLACK-NPF
Summit Series FUTUREFLEECE™ LT ½-Zip (Men’s) - NF0A5J8R
Quick buy
ICEBREAKER
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Women's) - IBBA56HC - Past Season
$130.00 $190.00
Sale
S M L XL
JET HEATHER-BLACK
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Women's) - IBBA56HC - Past Season
 BAJA
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Women's) - IBBA56HC - Past Season
Quick buy
ICEBREAKER
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Men's) - IBBA56H9 - Past Season
$130.00 $190.00
Sale
M L XL
BRILLIANT-BAJA
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Men's) - IBBA56H9 - Past Season
 PORT-BLAZE
Merino 200 ZoneKnit™ Long Sleeve Half Zip Thermal Top (Men's) - IBBA56H9 - Past Season
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Women's) - IBB04380
$140.00
M L XL
BLACK
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Women's) - IBB04380
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's) - IBB04367
$140.00
M L XL XXL
MIDNIGHT NAVY
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's) - IBB04367
 BLACK
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's) - IBB04367
 LODEN
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's) - IBB04367
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve V Neck Thermal Top (Women's) - IB104379 - Past Season
$80.00 $130.00
Sale
S M L XL
BLACK
Merino 200 Oasis Long Sleeve V Neck Thermal Top (Women's) - IB104379 - Past Season
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Crewe Thermal Top Ruapehu Round (Men's) - IB0A572O - Past Season
$90.00 $140.00
Sale
S M L
BRILLIANT
Merino 200 Oasis Long Sleeve Crewe Thermal Top Ruapehu Round (Men's) - IB0A572O - Past Season
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Crewe Thermal Top Remarkables (Men's) - IB0A56QU - Past Season
$90.00 $140.00
Sale
S M L XL
BLACK
Merino 200 Oasis Long Sleeve Crewe Thermal Top Remarkables (Men's) - IB0A56QU - Past Season
Quick buy
ICEBREAKER
Merino 260 Tech Long Sleeve Turtleneck Thermal Top (Men's) - IB0A56IE
$160.00
S M L XL
BLACK
Merino 260 Tech Long Sleeve Turtleneck Thermal Top (Men's) - IB0A56IE
Quick buy
SMARTWOOL
Intraknit Thermal Merino Base Layer Colorblock 1/4 Zip (Women's) - SW002837
$170.00
XS S M L XL
DEEP NAVY
Intraknit Thermal Merino Base Layer Colorblock 1/4 Zip (Women's) - SW002837
 BLACK
Intraknit Thermal Merino Base Layer Colorblock 1/4 Zip (Women's) - SW002837
Quick buy
SMARTWOOL
Intraknit Thermal Max Merino Base Layer 1/4 Zip (Women's) - SW002835
$190.00
S M L
BLACK
Intraknit Thermal Max Merino Base Layer 1/4 Zip (Women's) - SW002835
Quick buy
ARC'TERYX
Rho LT Zip Neck (Men's) - X000009425
$140.00
M L XL XXL
BLACK SAPPHIRE
Rho LT Zip Neck (Men's) - X000009425
 BLACK
Rho LT Zip Neck (Men's) - X000009425
Quick buy
ARC'TERYX
Rho Zip Neck (Women's) - X000007336
$140.00
S M L XL
BLACK
Rho Zip Neck (Women's) - X000007336
 STRATUS
Rho Zip Neck (Women's) - X000007336
Quick buy
ICEBREAKER
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's) - IB0A56H4 - Past Season
$110.00 $150.00
Sale
S M L XL
JET HEATHER-BLACK
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's) - IB0A56H4 - Past Season
 TANG-PRALINE
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's) - IB0A56H4 - Past Season
 DECO-ASHEN
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Women's) - IB0A56H4 - Past Season
Quick buy
ICEBREAKER
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's) - IB0A56H3 - Past Season
$110.00 $150.00
Sale
S M L XL
BAJA-BRILLIANT
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's) - IB0A56H3 - Past Season
 CLOUD RAY-HYPER
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's) - IB0A56H3 - Past Season
 JET HEATHER-BLACK
125 ZoneKnit™ Merino Blend Long Sleeve Crewe Thermal Top (Men's) - IB0A56H3 - Past Season
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Women's) - SW016905 - Past Season
$70.00 $120.00
Sale
XS S M L XL
EGGPLANT
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Women's) - SW016905 - Past Season
 TWILIGHT BLUE
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Women's) - SW016905 - Past Season
Quick buy
SWIX
RaceX Dry Half Zip (Men's) - 10099-23
$72.00 $90.00
Sale
M L XL XXL
BLACK-PHANTOM
RaceX Dry Half Zip (Men's) - 10099-23
Quick buy
SWIX
RaceX Dry Half Zip (Women's) - 10100-23 - Past Season
$70.00 $90.00
Sale
S M L
DUSTY PURPLE - LIGHT PURPLE
RaceX Dry Half Zip (Women's) - 10100-23 - Past Season
Quick buy
SWIX
RaceX Classic Wind Half Zip (Men's) - 10103-23
$68.00 $85.00
Sale
M L XL
BLACK
RaceX Classic Wind Half Zip (Men's) - 10103-23
Quick buy
SWIX
RaceX Classic Half Zip (Men's) - 10116-23
$80.00
S M L XL XXL
BLACK - PHANTOM
RaceX Classic Half Zip (Men's) - 10116-23
 DARK NAVY - BRIGHT WHITE
RaceX Classic Half Zip (Men's) - 10116-23
Quick buy
SWIX
RaceX Classic Half Zip (Women's) - 10111-23
$80.00
XS S M L XL
DARK NAVY - LAKE BLUE
RaceX Classic Half Zip (Women's) - 10111-23
 DUSTY PURPLE - LIGHT PURPLE
RaceX Classic Half Zip (Women's) - 10111-23
Quick buy
SWIX
RaceX Classic Long Sleeve (Men's) - 10115-23
$70.00
M L XL
BLACK
RaceX Classic Long Sleeve (Men's) - 10115-23
 COBALT
RaceX Classic Long Sleeve (Men's) - 10115-23
Quick buy
SWIX
RaceX Classic Long Sleeve (Women's) - 10110-23
$70.00
XS S M L
OLIVE-BRIGHT WHITE
RaceX Classic Long Sleeve (Women's) - 10110-23
 COBALT
RaceX Classic Long Sleeve (Women's) - 10110-23
Quick buy
SMARTWOOL
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
$160.00
XS S M L
EGGPLANT-BLACK
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
 SERENE BLUE-WHITE
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
 CASCADE GREEN-APRICOT
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
 BLACK
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
 PECAN BROWN - DEEP NAVY
Intraknit Thermal Merino Base Layer Pattern Crew (Women's) - SW016412
+ 2 more
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Crew Plus Boxed (Women's) - SW016803
From $90.00 $140.00
Sale
1X 2X 3X 4X
CHARCOAL HEATHER
Classic Thermal Merino Base Layer Crew Plus Boxed (Women's) - SW016803
 BLACK DIGI SNOW
Classic Thermal Merino Base Layer Crew Plus Boxed (Women's) - SW016803
Quick buy
RAB
Conduit Hoody (Women's) - QBL-43
From $70.00 $115.00
Sale
8 10 12 14 16
BELUGA
Conduit Hoody (Women's) - QBL-43
 PATROIT BLUE
Conduit Hoody (Women's) - QBL-43
Quick buy
RAB
Conduit Pull-On (Women's) - QBL-39 - Past Season
$60.00 $105.00
Sale
8 10 12 14
ULTRAMARINE
Conduit Pull-On (Women's) - QBL-39 - Past Season
 DEEP HEATHER
Conduit Pull-On (Women's) - QBL-39 - Past Season
Quick buy
RAB
Conduit Pull-On (Men's) - QBL-38
From $60.00 $105.00
Sale
M L XL
INK
Conduit Pull-On (Men's) - QBL-38
 LIGHT KHAKI
Conduit Pull-On (Men's) - QBL-38
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Men's) - SW016957 - Past Season
$90.00 $120.00
Sale
S M L XL XXL
BLACK
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Men's) - SW016957 - Past Season
 TWILIGHT BLUE
Classic All-Season Merino Base Layer 1/4 Zip Boxed (Men's) - SW016957 - Past Season
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
 BLACK
Classic All-Season Merino Base Layer Long Sleeve Boxed Plus (Women's) - SW016915
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Pattern 1/4 Zip Plus Boxed (Women's) - SW016806 - Past Season
$90.00 $150.00
Sale
1X 2X 3X
BLACK DOT
Classic Thermal Merino Base Layer Pattern 1/4 Zip Plus Boxed (Women's) - SW016806 - Past Season
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Pattern Crew Plus Boxed (Women's) - SW016804 - Past Season
$80.00 $140.00
Sale
1X 2X 3X
BLACK DOT
Classic Thermal Merino Base Layer Pattern Crew Plus Boxed (Women's) - SW016804 - Past Season
Quick buy
SMARTWOOL
Classic Thermal Merino Base Layer Pattern Crew Boxed (Men's) - SW016352 - Past Season
$80.00 $140.00
Sale
S M L XL
BLACK MOUNTAIN SCAPE
Classic Thermal Merino Base Layer Pattern Crew Boxed (Men's) - SW016352 - Past Season
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer Long Sleeve Boxed (Women's) - SW016913
$115.00
XS S M L XL
BLACK
Classic All-Season Merino Base Layer Long Sleeve Boxed (Women's) - SW016913
 TWILIGHT BLUE
Classic All-Season Merino Base Layer Long Sleeve Boxed (Women's) - SW016913
 EGGPLANT
Classic All-Season Merino Base Layer Long Sleeve Boxed (Women's) - SW016913
Quick buy
SMARTWOOL
Classic All-Season Merino Base Layer Long Sleeve Boxed (Men's) - SW016953
$115.00
S M L XL XXL
BLACK
Classic All-Season Merino Base Layer Long Sleeve Boxed (Men's) - SW016953
 LAGUNA BLUE-DEEP NAVY
Classic All-Season Merino Base Layer Long Sleeve Boxed (Men's) - SW016953
 TWILIGHT BLUE MOUNTAIN
Classic All-Season Merino Base Layer Long Sleeve Boxed (Men's) - SW016953
 FERN GREEN
Classic All-Season Merino Base Layer Long Sleeve Boxed (Men's) - SW016953
 IRON HEATHER
Classic All-Season Merino Base Layer Long Sleeve Boxed (Men's) - SW016953
+ 2 more
Quick buy
ICEBREAKER
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's) - IB104367 - Past Season
$75.00 $135.00
Sale
S M L XL
BLACK
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's) - IB104367 - Past Season
 LODEN
Merino 200 Oasis Long Sleeve Half Zip Thermal Top (Men's) - IB104367 - Past Season
Quick buy
SWIX
RaceX Bodywear 1/2 Zip (Women's) - 40826 - Past Season
$50.00 $75.00
Sale
M L XL
BLUE SEA
RaceX Bodywear 1/2 Zip (Women's) - 40826 - Past Season
 DARK NAVY
RaceX Bodywear 1/2 Zip (Women's) - 40826 - Past Season
Quick buy
BONNETIER
Basic Luxe (Women's)
$135.00
XS S M L
CHERRY-FERN
Basic Luxe (Women's)
 CHERRY-BEAR
Basic Luxe (Women's)
 SUN-MOUNTAINS
Basic Luxe (Women's)
 BURNT ORANGE-PINE
Basic Luxe (Women's)
+ 1 more