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Men's Lightweight Base Layer Tops

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Products (42)

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Top Rated
Icebreaker150 Zone Long-Sleeve Crew Shirt - Men's
$65.93 compared to $95.00
You save 30%
88 reviews with an average rating of 4.8 out of 5 stars
REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's Tall Sizes
$39.95
6 reviews with an average rating of 3.7 out of 5 stars
Colors
REI Outlet
CraftActive Intensity Base Layer Top - Men's
$46.73 compared to $64.98
You save 28%
4 reviews with an average rating of 4.8 out of 5 stars
Top Rated
REI Co-opLightweight Base Layer Long-Sleeve Zip-Neck Top - Men's Tall Sizes
$44.95
6 reviews with an average rating of 4.5 out of 5 stars
Colors
REI Outlet
CraftCore Warm Base-Layer Set - Men's
$62.73 compared to $79.95
You save 21%
0 reviews
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
$79.95
2 reviews with an average rating of 4.5 out of 5 stars
SaxxQuest Long-Sleeve Crew Base Layer Top - Men's
$58.00
1 reviews with an average rating of 5.0 out of 5 stars
REI Outlet
SmartwoolMerino 150 Long-Sleeve Base Layer Top - Men's
$63.73 compared to $85.00
You save 25%
0 reviews
Colors
REI Outlet
Threads 4 ThoughtBrennan Base Layer Long-Sleeve Quarter-Zip Top - Men's
$46.73 compared to $68.00
You save 31%
1 reviews with an average rating of 5.0 out of 5 stars
REI Outlet
CraftCore Dry Base-Layer Set - Men's
$54.73 compared to $69.95
You save 21%
0 reviews
Colors

ArtilectGoldhill 125 Zoned Crew Base Layer Top - Men's
$83.93 compared to $120.00
You save 30%
0 reviews
Colors

Ortovox140 Cool Vintage Badge T-Shirt - Men's
$80.00
0 reviews
Colors

OdloBlackcomb Ceramicool Base Layer Crew Shirt - Men's
$31.83 compared to $65.00
You save 51%
4 reviews with an average rating of 3.3 out of 5 stars
Colors

Ortovox120 Comp Light Long-Sleeve Base Layer Top - Men's
$49.83 - $100.00
2 reviews with an average rating of 5.0 out of 5 stars
Colors

OdloKinship Light Crew Base Layer Top - Men's
$31.83 compared to $65.00
You save 51%
6 reviews with an average rating of 4.3 out of 5 stars
Colors
Top Rated
SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's
$90.00
23 reviews with an average rating of 4.7 out of 5 stars
Colors

REI Co-opMerino 185 Base Layer Top - Men's
$69.95
18 reviews with an average rating of 4.4 out of 5 stars
REI Outlet
tasc PerformanceElevation Merino T-Shirt - Men's
$54.73 compared to $74.00
You save 26%
11 reviews with an average rating of 4.4 out of 5 stars
Colors
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
$89.95
28 reviews with an average rating of 4.6 out of 5 stars
Colors
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
$79.95
47 reviews with an average rating of 4.7 out of 5 stars
Colors

REI Co-opLightweight Base Layer Half-Zip Top - Men's
$44.95
55 reviews with an average rating of 4.5 out of 5 stars
Colors
Top Rated
SmartwoolClassic All-Season Merino Base Layer Long-Sleeve Top - Men's
$85.00
57 reviews with an average rating of 4.7 out of 5 stars
Colors

REI Co-opLightweight Base Layer Crew Top - Men's
$29.95
49 reviews with an average rating of 4.1 out of 5 stars
Colors
Top Rated
REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's
$39.95
97 reviews with an average rating of 4.5 out of 5 stars
Colors
Top Rated
SmartwoolClassic All-Season Merino Base Layer T-Shirt - Men's
$36.83 - $75.00
52 reviews with an average rating of 4.7 out of 5 stars
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$89.95
4 reviews with an average rating of 4.8 out of 5 stars
Ortovox120 Cool Tec Wood T-Shirt - Men's
$44.83 compared to $90.00
You save 50%
2 reviews with an average rating of 5.0 out of 5 stars
New Arrival
SmartwoolIntraknit Thermal Merino Half-Zip Base Layer Hoodie - Men's
$155.00
3 reviews with an average rating of 3.7 out of 5 stars
Ortovox120 Comp Light Base Layer Top - Men's
$39.83 compared to $80.00
You save 50%
0 reviews
Colors
New Arrival
SmartwoolIntraknit Thermal Merino Quarter-Zip Base Layer Top - Men's
$135.00
0 reviews

Get the latest deals, news, & more from REI Co-op!

Men's Lightweight Base Layer Tops

Icebreaker150 Zone Long-Sleeve Crew Shirt - Men's

REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's Tall Sizes

CraftActive Intensity Base Layer Top - Men's

REI Co-opLightweight Base Layer Long-Sleeve Zip-Neck Top - Men's Tall Sizes

CraftCore Warm Base-Layer Set - Men's

REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes

SaxxQuest Long-Sleeve Crew Base Layer Top - Men's

SmartwoolMerino 150 Long-Sleeve Base Layer Top - Men's

Threads 4 ThoughtBrennan Base Layer Long-Sleeve Quarter-Zip Top - Men's

CraftCore Dry Base-Layer Set - Men's

ArtilectGoldhill 125 Zoned Crew Base Layer Top - Men's

Ortovox140 Cool Vintage Badge T-Shirt - Men's

OdloBlackcomb Ceramicool Base Layer Crew Shirt - Men's

Ortovox120 Comp Light Long-Sleeve Base Layer Top - Men's

OdloKinship Light Crew Base Layer Top - Men's

SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's

REI Co-opMerino 185 Base Layer Top - Men's

tasc PerformanceElevation Merino T-Shirt - Men's

REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's

REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's

REI Co-opLightweight Base Layer Half-Zip Top - Men's

SmartwoolClassic All-Season Merino Base Layer Long-Sleeve Top - Men's

REI Co-opLightweight Base Layer Crew Top - Men's

REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's

SmartwoolClassic All-Season Merino Base Layer T-Shirt - Men's

REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes

Ortovox120 Cool Tec Wood T-Shirt - Men's

SmartwoolIntraknit Thermal Merino Half-Zip Base Layer Hoodie - Men's

Ortovox120 Comp Light Base Layer Top - Men's

SmartwoolIntraknit Thermal Merino Quarter-Zip Base Layer Top - Men's

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Icebreaker150 Zone Long-Sleeve Crew Shirt - Men's

REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's Tall Sizes

CraftActive Intensity Base Layer Top - Men's

REI Co-opLightweight Base Layer Long-Sleeve Zip-Neck Top - Men's Tall Sizes

CraftCore Warm Base-Layer Set - Men's

REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes

SaxxQuest Long-Sleeve Crew Base Layer Top - Men's

SmartwoolMerino 150 Long-Sleeve Base Layer Top - Men's

Threads 4 ThoughtBrennan Base Layer Long-Sleeve Quarter-Zip Top - Men's

CraftCore Dry Base-Layer Set - Men's

ArtilectGoldhill 125 Zoned Crew Base Layer Top - Men's

Ortovox140 Cool Vintage Badge T-Shirt - Men's

OdloBlackcomb Ceramicool Base Layer Crew Shirt - Men's

Ortovox120 Comp Light Long-Sleeve Base Layer Top - Men's

OdloKinship Light Crew Base Layer Top - Men's

SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's

REI Co-opMerino 185 Base Layer Top - Men's

tasc PerformanceElevation Merino T-Shirt - Men's

REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's

REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's

REI Co-opLightweight Base Layer Half-Zip Top - Men's

SmartwoolClassic All-Season Merino Base Layer Long-Sleeve Top - Men's

REI Co-opLightweight Base Layer Crew Top - Men's

REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's

SmartwoolClassic All-Season Merino Base Layer T-Shirt - Men's

REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes

Ortovox120 Cool Tec Wood T-Shirt - Men's

SmartwoolIntraknit Thermal Merino Half-Zip Base Layer Hoodie - Men's

Ortovox120 Comp Light Base Layer Top - Men's

SmartwoolIntraknit Thermal Merino Quarter-Zip Base Layer Top - Men's