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Smartwool Thermal

(70 products)

Products (70)

Sort: Best Match

SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's Plus Sizes
$115.00 - $120.00
19 reviews with an average rating of 4.4 out of 5 stars
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$64.83 - $130.00
189 reviews with an average rating of 4.4 out of 5 stars
SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
$56.83 - $115.00
735 reviews with an average rating of 4.5 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Base Layer Bottoms - Men's
$115.00
615 reviews with an average rating of 4.7 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's
$83.93 - $120.00
26 reviews with an average rating of 4.8 out of 5 stars
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$130.00
27 reviews with an average rating of 4.3 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's
$105.00
84 reviews with an average rating of 4.7 out of 5 stars
Top Rated
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$69.83 - $140.00
10 reviews with an average rating of 4.9 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$56.83 - $115.00
1505 reviews with an average rating of 4.7 out of 5 stars
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Men's
$130.00
21 reviews with an average rating of 4.2 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$56.83 - $115.00
1151 reviews with an average rating of 4.7 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$59.83 - $120.00
15 reviews with an average rating of 4.9 out of 5 stars
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's
$64.83 - $130.00
188 reviews with an average rating of 4.3 out of 5 stars
SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
$86.73
Save 24%
compared to $115.00
246 reviews with an average rating of 4.4 out of 5 stars
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New arrival
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women's
$89.73
Save 25%
compared to $120.00
0 reviews
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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
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New arrival
SmartwoolIntraknit Thermal Max Merino Base Layer Bottoms - Women's
$101.73
Save 24%
compared to $135.00
0 reviews
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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
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Top Rated
SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'
$48.73
Save 25%
compared to $65.00
52 reviews with an average rating of 4.7 out of 5 stars
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SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'
$48.73
Save 25%
compared to $65.00
4 reviews with an average rating of 3.5 out of 5 stars
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New arrival
SmartwoolIntraknit Thermal Max Merino Base Layer Pattern Hoodie - Women's
$123.73
Save 25%
compared to $165.00
0 reviews
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SmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's
$82.73
Save 28%
compared to $115.00
0 reviews
REI OUTLET
Top Rated
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men's
$89.73
Save 25%
compared to $120.00
15 reviews with an average rating of 4.9 out of 5 stars
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SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's
$90.73
Save 30%
compared to $130.00
2 reviews with an average rating of 4.5 out of 5 stars
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SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's
$97.73
Save 24%
compared to $130.00
119 reviews with an average rating of 4.3 out of 5 stars
REI OUTLET
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$97.73
Save 24%
compared to $130.00
27 reviews with an average rating of 4.3 out of 5 stars
REI OUTLET
SmartwoolClassic Thermal Merino Lettuce Edge Base Layer Bottoms - Women's
$82.73
Save 28%
compared to $115.00
0 reviews
REI OUTLET
SmartwoolClassic Thermal Merino Base Layer Hoodie - Kids'
$56.73
Save 24%
compared to $75.00
3 reviews with an average rating of 4.7 out of 5 stars
REI OUTLET
New arrival
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Kids'
$52.73
Save 24%
compared to $70.00
0 reviews
REI OUTLET
New arrival
SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's
$97.73
Save 24%
compared to $130.00
11 reviews with an average rating of 4.4 out of 5 stars
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1–30 of 70 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