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Base Layer Tops

(216 products)

Products (216)

Sort: Best Match

Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Women's
$85.00 - $100.00
11 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women's
$56.83 - $115.00
16 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
REI Co-opMidweight Crew Base Layer Top - Toddlers'
$24.95
14 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Base Layer Crew Top - Kids'
$41.93 - $60.00
8 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Arms of Andes160 Ultralight Alpaca Wool Crew Neck Base Layer T-Shirt - Women's
$75.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular
Top Rated
IcebreakerMerino 150 Tech Lite III Relaxed T-Shirt - Women's
$80.00
69 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI Co-opMerino 185 Base Layer Top - Men's
$69.95
51 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
The North FaceSummit Series Pro 120 Crew Base Layer Top - Women's
$100.00
12 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Plus
Icebreaker125 Cool-Lite Merino Blend Sphere III Scoop T-Shirt - Women's
$75.00
17 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Ortovox120 Comp Light Base Layer Hoody - Men's
$120.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
New arrival
Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men's
$112.73
Save 19%
compared to $140.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
REI OUTLET
Helly HansenHH Durawool Graphic T-Shirt - Women's
$90.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
Arc'teryxRho Base Layer Hoody - Women's
$96.73
Save 19%
compared to $120.00
21 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$86.73
Save 24%
compared to $115.00
365 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
REI OUTLET
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women's
$89.73
Save 25%
compared to $120.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Plus
REI OUTLET
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women's
$78.73
Save 25%
compared to $105.00
122 reviews with an average rating of 4.7 out of 5 stars
Size Type:
Regular, Plus
REI OUTLET
Top Rated
SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
$67.73
Save 24%
compared to $90.00
56 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$86.73
Save 24%
compared to $115.00
273 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Terramar1.0 All-Season Lightweight Merino Wool T-Shirt - Men's
$34.73
Save 30%
compared to $50.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Ortovox120 Cool Tec Fast Upward Base Layer T-Shirt - Women's
$44.83
Save 50%
compared to $90.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Ortovox185 Merino Rock'n'wool Base Layer Top - Women's
$49.83
Save 50%
compared to $100.00
2 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Ortovox120 Cool Tec Clean Base Layer T-Shirt - Men's
$90.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Big
Helly HansenLifa Merino Midweight Half-Zip Base Layer Top - Men's
$110.00
4 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Free CountryMicrotech Heat Cocaber Base Layer Top - Men's
$26.73
Save 33%
compared to $40.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big
REI OUTLET
Free CountryForce Grid Fleece Base Layer Top - Men's
$29.73
Save 33%
compared to $45.00
4 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big
REI OUTLET
Free CountryMicrotech Heat Base Layer Top - Men's
$28.73
Save 36%
compared to $45.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Big
REI OUTLET
Kari TraaLune Long-Sleeve Base Layer Top - Women's
$48.73
Save 25%
compared to $65.00
2 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Helly HansenLifa Active Graphic Crew Base Layer Top - Women's
$48.73
Save 25%
compared to $65.00
3 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Top Rated
Free CountryForce Grid Fleece Crew Base Layer Top - Men's
$31.73
Save 29%
compared to $45.00
5 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big, Regular
REI OUTLET
Top Rated
CotopaxiLiso Base Layer Top - Men's
$48.73
Save 25%
compared to $65.00
37 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET

91–120 of 216 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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