Skip to content
Skip to navigation
Buy now, pay later. Learn more.
Sleep week is here: up to 50% off >
Big splash event: up to 40% off >
See our 2024 sustainability initiatives >
Spring savings: up to 60% off >
Français
Account
Help
Cart
Deals
New arrivals
Gear
Women
Men
Kids
Footwear
Brands
About us
Hike & camp
Water
Climb
Cycle
Run & fitness
Travel
Packs
Electronics
Snowsports
Home
Products
Clothing
Base layers and underwear
Base layers
Category
View all
Clothing
(31)
Base layers and underwear
(31)
Base layers
(31)
Base layer tops
(18)
Base layer bottoms
(13)
Shirts and tops
(1)
Camping and hiking
(31)
Ski and snowsports
(25)
Climbing
(19)
Current Offers
clearance
61
More
Gender
womens
238
mens
180
unisex
5
More
Brand
MEC
101
icebreaker
33
Patagonia
17
Smartwool
16
Kombi
11
BN3TH
5
More
Ideal for
Camping and hiking
153
Backpacking
8
Casual wear
5
Alpine climbing and mountaineering
154
Snowsports
133
Running, fitness and training
37
Backcountry skiing
16
Active winter wear
15
Ice climbing
9
Winter and expedition camping
9
More
Price
All
Under $25.00
$25.00 - $50.00
$50.00 - $100.00
$100.00 - $200.00
$200.00 - $500.00
$500.00 - $1,000.00
$1,000.00 - $2,500.00
$2,500.00 & Up
$
-
$
Go
Customer Rating
(6)
(16)
(2)
(4)
Clear
Colour
Show colour information
Clear
Features
Hood
4
Antimicrobial treatment
50
Gusseted crotch
49
Thumb loops
11
More
categories.lvl1
More
categories.lvl2
More
categories.lvl3
More
categories.lvl4
More
categories.lvl5
More
categories.lvl6
More
categories.lvl7
More
Men's Shoe Size
More
Women's Shoe Size
More
Men's Clothing Sizes
Medium
44
Large
43
Small
43
X-Large
33
XX-Large
22
More
Women's Clothing Sizes
Medium
44
Large
43
Small
43
X-Large
33
XX-Large
22
More
Product sustainability
Recycled content
91
Bluesign® Approved Material
32
Certified Fair Trade
13
Preferred Lyocell
5
Responsible wool
4
More
discount
30-39%
5
40-49%
41
50-59%
15
More
See results
Base layers
Showing 31 results
Filter
Sort by
Popularity
Price: Low to high
Price: High to low
Top rated
gender:
mens
✕
unisex
✕
(1)
icebreaker 125 ZoneKnit Long Sleeve Crewe - Men's
$144.95
Compare
(3)
icebreaker 125 ZoneKnit Leggings - Men's
$144.95
Compare
(68)
icebreaker 200 Oasis LS Crewe Thermal Top - Men's
$124.95
Compare
(5)
MEC T0 Base Layer Long Sleeve Top - Men's
$49.95
Compare
(5)
MEC T0 Base Layer Bottoms - Men's
$49.95
Compare
(0)
Patagonia Capilene Air Bottoms - Men's
$169.00
Compare
(1)
Patagonia Capilene Midweight Crew - Men's
$99.00
Compare
(405)
Smartwool Classic Thermal Merino Base Layer Bottoms - Men's
$139.95
Compare
(2)
MEC T0 Base Layer Short Sleeve Top - Men's
$39.95
Compare
(7)
MEC T2 Merino Base Layer Long Sleeve Top - Men's
$99.95
Compare
(4)
MEC T2 Merino Base Layer Bottoms - Men's
$99.95
Compare
(1)
MEC T1 Merino Baselayer Short Sleeve Top - Men's
$69.95
Compare
SAVE 50%
(3)
MEC T3 Warmest Base Layer Bottoms - Men's
$34.97
$69.95
Compare
SAVE 50%
(4)
MEC T2 Base Layer Bottoms - Men's
$29.97
$59.95
Compare
SAVE 40%
(5)
MEC T3 Merino Base Layer Long Sleeve Top - Men's
$65.97
$109.95
Compare
SAVE 40%
(5)
MEC T3 Merino Base Layer Bottoms - Men's
$65.97
$109.95
Compare
SAVE 40%
(4)
MEC T3 Merino Base Layer 1/4 Zip Long Sleeve Top - Men's
$71.97
$119.95
Compare
(0)
Patagonia Capilene Midweight Bottoms - Men's
$99.00
Compare
SAVE 40%
(0)
Kombi RedHEAT Active Long Bottoms - Men's
$41.97
$69.95
Compare
SAVE 40%
(3)
Kombi RedHEAT Active Crew Top - Men's
$41.97
$69.95
Compare
(567)
Smartwool Classic Thermal Merino Base Layer Crew - Men's
$139.95
Compare
SAVE 40%
(9)
icebreaker 200 Oasis LS Crewe Ski Stripes Thermal Top - Men's
$80.97
$134.95
Compare
(173)
icebreaker 200 Oasis LS Half Zip - Men's
$134.95
Compare
(217)
icebreaker 260 Tech Leggings with Fly - Men's
$144.95
Compare
(280)
icebreaker 260 Tech Long Sleeve Crewe - Men's
$144.95
Compare
SAVE 40%
(1)
Kombi Merino Mix Active Crew Top - Men's
$38.97
$64.95
Compare
SAVE 30%
(4)
BN3TH Classic PJ Pants - Unisex
$52.46
$74.95
Compare
(13)
Smartwool Classic Thermal Merino Base Layer Hoodie - Men's
$179.95
Compare
(36)
Smartwool Intraknit Thermal Merino Base Layer 3/4 Bottom - Men's
$139.95
Compare
(26)
The North Face Summit Pro 120 Crew Top - Men's
$129.99
Compare
SAVE 40%
(1)
MEC T2 Merino Base Layer Hooded - Men's
$71.97
$119.95
Compare
‹
1
›
Compare (0)
Remove all
Compare