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Long Sleeve Base Layers

(246 products)

Products (246)

Sort: Best Match

Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's
$104.73
Save 30%
compared to $150.00
1 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaEloise Half-Zip Base Layer Top - Women's
$59.73
Save 25%
compared to $80.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
SmartwoolClassic Thermal Merino Base Layer Crew One-Piece - Women's
$250.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
ArtilectDarkhorse 185 Zoned Quarter-Zip Base Layer Top - Women's
$98.73
Save 41%
compared to $170.00
2 reviews with an average rating of 3.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Hot ChillysPeach Skins T-Neck Base Layer Top - Kids'
$32.73
Save 34%
compared to $50.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Kari TraaMalia Half-Zip Base Layer Top - Women's
$59.73
Save 25%
compared to $80.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
REI OUTLET
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
$115.00
34 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
$150.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's
$90.00
11 reviews with an average rating of 3.7 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
Icebreaker300 MerinoFine Polar Long-Sleeve Half-Zip Thermal Base Layer Top - Men's
$250.00
5 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Helly HansenLIFA Merino Midweight Balaclava Hoodie - Women's
$106.73
Save 28%
compared to $150.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's
$150.00 - $155.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
$84.73
Save 26%
compared to $115.00
37 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
REI OUTLET
ArtilectFlatiron 185 Crew Base Layer Top - Men's
$96.73
Save 30%
compared to $140.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's
$145.00
15 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
SmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's
$82.73
Save 28%
compared to $115.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Ortovox185 Rock'N'Wool Zip Neck Base Layer Top - Men's
$130.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's
$93.73
Save 25%
compared to $125.00
8 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Men's
$155.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Terramar3.0 Thermawool Crew Base Layer Top - Women's
$49.73 - $52.73
Save 24% - 28%
compared to $70.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
The North FaceDotKnit Thermal Base Layer Set - Kids'
$80.00
7 reviews with an average rating of 3.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
CraftCore Dry Active Comfort Long-Sleeve Base Layer Jersey - Kids'
$38.73
Save 40%
compared to $64.95
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
$109.00
8 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
IcebreakerMerino 260 Vertex Long-Sleeve Crewe Natural Shades Base Layer Top - Women's
$89.73
Save 35%
compared to $140.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
ArtilectBoulder 125 Crew Long-Sleeve Base Layer Top - Women's
$65.73
Save 45%
compared to $120.00
1 reviews with an average rating of 1.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Helly HansenHH Durawool Crew Long-Sleeve Base Layer Top - Men's
$64.73
Save 28%
compared to $90.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Men's
$99.73
Save 26%
compared to $135.00
43 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
REI OUTLET
KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Women's
$119.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Men's
$99.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
BurtonFleece Base Layer Set - Toddlers'
$64.95
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular

151–180 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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