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Smartwool Long Sleeve Base Layers

(34 products)

Products (34)

Sort: Best Match

New arrival
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Kids'
$52.73
Save 24%
compared to $70.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
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
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
SmartwoolIntraknit Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's
$97.93
Save 30%
compared to $140.00
1 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular
SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's
$90.93
Save 30%
compared to $130.00
11 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big

31–34 of 34 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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