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Heavyweight Base Layers

(50 products)

Products (50)

Sort: Best Match

REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
$69.93 - $99.95
20 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
Top Rated
REI Co-opHeavyweight Merino Base Layer Bottoms - Women's
$69.93
Save 30%
compared to $99.95
17 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
Top Rated
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women's
$72.93 - $104.95
18 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's
$109.00
17 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's
$125.00
43 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
Top Rated
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Women's
$69.93 - $99.95
23 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$125.00
49 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
PatagoniaCapilene Thermal Weight Long-Underwear Bottoms - Men's
$99.00
14 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Men's
$99.00
8 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's
$74.93 - $100.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$72.93 - $104.95
14 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big, Tall
PatagoniaCapilene Thermal Weight Long Underwear Bottoms - Women's
$99.00
14 reviews with an average rating of 3.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's
$109.00
14 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Icebreaker260 ZoneKnit Long-Sleeve Crewe Thermal Top - Men's
$165.00
3 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Top Rated
Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women's
$86.93 - $125.00
29 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
Top Rated
Kari TraaRose Half-Zip Base Layer Top - Women's
$89.73
Save 25%
compared to $120.00
17 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Kari TraaJuliane Wool Long-Sleeve Base Layer Top - Women's
$90.73
Save 30%
compared to $130.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Kari TraaLune Base Layer Pants - Women's
$48.73
Save 25%
compared to $65.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
IcebreakerMerino 260 Vertex Long-Sleeve Half-Zip Herenga Base Layer Top - Women's
$104.93
Save 30%
compared to $150.00
9 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
NRSExpedition Weight Base Layer Pants - Men's
$84.95
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
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
IcebreakerMerino 260 Vertex Long-Sleeve Crewe Glacial Flow Base Layer Top - Women's
$104.73
Save 25%
compared to $140.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Terramar4.0 Genesis Expedition-Weight Base Layer Pants - Women's
$24.73
Save 29%
compared to $35.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Terramar3.0 Altitude Heavyweight Crew Base Layer Top - Women's
$16.73
Save 33%
compared to $25.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Kari TraaRose Base Layer Hoodie - Women's
$97.73
Save 24%
compared to $130.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Kari TraaRose Long-Sleeve Base Layer Top - Women's
$49.73
Save 54%
compared to $110.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
New arrival
IcebreakerMerino 260 Tech Thermal Base Layer Leggings With Fly - Men's
$93.73
Save 25%
compared to $125.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
REI OUTLET
Helly HansenGraphic Lifa Merino Base Layer Set - Kids'
$74.73
Save 32%
compared to $110.00
1 reviews with an average rating of 1.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Terramar4.0 Genesis Crew Base Layer Top - Women's
$24.73
Save 29%
compared to $35.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
New arrival
Kari TraaLilja Base Layer Pants - Women's
$49.73
Save 24%
compared to $66.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET

1–30 of 50 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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