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Men's Long Underwear Bottoms
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, 90+ brands, 200+ products
Evo
Smartwool Classic Thermal Merino Base Layer Bottoms - Men's
$115
Icebreaker
Men's Merino 200 Oasis Thermal Leggings wFly
$105
+1
Aether Apparel
Premium Merino Base Layer Pant
$125
Filson
400g Merino Wool Bottoms - Dark Olive
$199
Filson
400g Merino Wool Bottoms - Black
$199
Decathlon
Forclaz Men's Mountain Backpacking Merino Wool Base Layer Tights Leggings - MT900
$99.99
Quince
4.9 (92)100% Merino Wool Cold Weather Base Layer Bottoms
$54.90
REI
5.0 (5)Icebreaker 200 Sonebula Leggings - Men's
$89.73
Icebreaker
Men's 300 MerinoFine™ Polar Thermal Leggings
$200
Outdoor Research
Men's Alpine Onset Merino 150 Bottoms
$99
+1
Arc'teryx
Rho SV Bottom Men's
$120
Arc'teryx
Rho LT Bottom Print Men's
$120
Here are a range of men’s long underwear bottoms—budget basics, midweight thermals, and premium merino options.
Material preference?
Merino Wool
Synthetic/Poly
Cotton/Waffle Knit
No-itch Blend
Warmth level?
Lightweight
Midweight
Heavyweight/Expedition
Best for?
Everyday layering
Ski/Snowboard
Hunting/Workwear
Running/Training
SuggestionsShow me midweight merino options
I want the warmest heavyweight bottoms
I need budget-friendly long johns
I’m using these for skiing—what should I pick?
Show more options in black or dark colors
