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Shop men's extreme cold thermal underwear in heavyweight base layers with brushed fleece, merino blends, and compression fits for skiing, work, and winter travel.
Shop men's extreme cold thermal underwear in heavyweight base layers with brushed fleece, merino blends, and compression fits for skiing, work, and winter travel.
Men’s Heavyweight Thermal Underwear
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40+ stores, 50+ brands, 100+ products
RUDSAK
FRANC - 6524541 Iceland
$245
Muji
Warm Cotton Long Tights
$14.99
Macy's
4.7 (47)Men's Original Alberto Pant
$24.99
JCPenney
4.6 (47)Heat Holders Mens Original Alberto Thermal Pants
$39.99
Smartwool
Men's Classic Thermal Merino Base Layer Bottom Boxed
$125
REI
4.1 (16)Capilene Thermal Weight Long-Underwear Bottoms - Men's
$78.93
Zara
COMPRESSION BASE LAYER SKI TIGHTS
$35.99
RUDSAK
FRANC - 6524541 Black
$245
Here are men’s heavyweight / extreme-cold thermal underwear options—mix of brushed-fleece warmth, merino blends, and compression ski tights.
Which fabric/feel do you want?
Merino / Merino Blend
Brushed Fleece / Fleece-Lined
Synthetic Performance (quick-dry)
Fit preference?
Compression / Tight
Athletic (close but not tight)
Relaxed
What pieces do you need?
Bottoms
Top
Set (top + bottom)
One-piece union suit
SuggestionsShow me the warmest expedition-weight options
Focus on merino blends (no itch)
I want compression base layers for skiing
I need durable thermals for outdoor work
Browse more men’s heavyweight base layers
