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Browse men's long underwear bottoms in lightweight to expedition weights, merino or synthetic blends, base-layer tights and waffle knits, and everyday to cold-weather styles.
Browse men's long underwear bottoms in lightweight to expedition weights, merino or synthetic blends, base-layer tights and waffle knits, and everyday to cold-weather styles.
Men’s Long Underwear Bottoms
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50+ stores, 70+ brands, 100+ products
The North Face
4.5 (10)TNF X Smartwool Men’s Merino Blend 150 Bottoms
$90
Decathlon
Forclaz Men's MT500 Merino Wool Base Layer Tights
$79.99
Icebreaker
Men's Merino 200 Oasis 3/4 Thermal Leggings
$95
Outdoor Research
Men's Alpine Onset Merino 150 Bottoms
$99
+1
Fjällräven
Bergtagen Merino 190 LJ M
$145
Smartwool
Men's Classic Thermal Merino Base Layer Bottom
$125
Mack Weldon
WARMKNIT Long Underwear
$54.99
Quince
4.9 (121)100% Merino Wool Cold Weather Base Layer Bottoms
$56
Here’s a mix of men’s long underwear bottoms across lightweight → expedition weights, including merino, synthetic blends, and some everyday/cold-weather picks.
Warmth level?
Lightweight
Midweight
Expedition / Heavyweight
Waffle Knit
Material preference?
Merino
Merino Blend
Synthetic (poly/nylon/spandex)
Cotton Blend
Best use?
Everyday / Around Town
Ski / Snowboard
Hiking / Backpacking
Work Outdoors
Running / High Output
SuggestionsShow me more waffle-knit thermal bottoms
Focus on lightweight merino base-layer tights
I need expedition-weight for very cold weather
I want synthetic blends that dry fast
Help me choose the right weight for my temps/activity
