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Long Sleeve Base Layers

(246 products)

Products (246)

Sort: Best Match

SmartwoolClassic Thermal Merino Half-Zip Base Layer Hoodie - Women's
$145.00
1 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular
SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Men's
$130.00
2 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular
PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's
$109.00 - $115.00
14 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Wild RyeBassett LITE Raglan Base Layer Top - Women's
$99.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
$135.00
43 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
StioBasisPeak Wool Midweight Half-Zip Base Layer Top - Women's
$149.00
3 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Kari TraaFryd Long-Sleeve Base Layer Top - Women's
$40.73
Save 32%
compared to $60.00
28 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
REI OUTLET
Free CountryMicrotech Heat Cocarber Base Layer Top - Women's
$28.73
Save 42%
compared to $50.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
$99.73
Save 26%
compared to $135.00
34 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
REI OUTLET
SpraywayEffra Jacket Base Layer Top - Women's
$42.73
Save 34%
compared to $64.95
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
REI OUTLET
Top Rated
The North FaceDotKnit Thermal Base Layer Set - Toddlers'
$70.00
15 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
SpraywayEffra Crew Base Layer Top - Women's
$36.73
Save 26%
compared to $49.95
2 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Kari TraaFaith Half-Zip Base Layer Top - Women's
$86.73
Save 27%
compared to $120.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
CraftCORE Dry Active Comfort Base Layer Top - Women's
$39.73
Save 38%
compared to $64.95
5 reviews with an average rating of 3.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Base Layer Top - Women's
$120.00
1 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Women's
$57.73
Save 47%
compared to $110.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's
$135.00
34 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
Kari TraaAnna Half-Zip Base Layer Top - Women's
$120.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Women's
$109.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
SmartwoolIntraknit Thermal Merino Base Layer Hoodie - Women's
$180.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Kari TraaVilma Half-Zip Base Layer Top - Women's
$74.73
Save 25%
compared to $100.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaAlma Hood Base Layer Top - Women's
$59.73
Save 25%
compared to $80.00
0 reviews
Underwear Weight:
Ultralightweight
Size Type:
Regular
REI OUTLET
Top Rated
Kari TraaRose Half-Zip Base Layer Top - Women's
$89.73
Save 25%
compared to $120.00
50 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Plus, Regular
REI OUTLET
IcebreakerSiren Sweetheart Long Underwear Top - Women's
$85.00
27 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
Icebreaker260 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's
$119.73
Save 27%
compared to $165.00
8 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Deux par DeuxThermal Underwear Base Layer Set - Kids'
$49.93
Save 30%
compared to $72.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
Hootie HooTorrent Layering Fleece Base Layer Set - Toddler's
$75.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Kari TraaFryd Half-Zip Base Layer Top - Women's
$48.73
Save 26%
compared to $66.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
REI OUTLET
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
$79.95
10 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Tall
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.73
Save 25%
compared to $105.00
80 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET

121–150 of 246 products

Sort: Best Match

Related Expert Advice articles

What material is best?

Wool is moisture-wicking and odor-resistant, while synthetic fabrics are more durable and less expensive.

Match the temp to the trek

Lightweight layers are best for moderate to cool temperatures. Midweight layers are best for cold temperatures. Heavyweight layers are best for below-freezing temperatures.

Find your fit

To be able to wick sweat efficiently, your next-to-skin layer needs to actually be next to your skin. A comfortably snug fit everywhere is your goal.

Read full article: How to Choose Base Layers

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