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Men's Thermal Underwear for Hiking
Explore men’s hiking thermal underwear in lightweight and heavyweight base layers, merino and synthetic knits, crew and long-sleeve tops, and full-length bottoms.
Men’s Thermal Underwear for Hiking
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40+ stores, 80+ brands, 200+ products
Evo
Smartwool Classic Thermal Merino Base Layer Crew Top - Men's
$115
Zappos
Classic Thermal Merino Base Layer Crew
$115
Filson
400g Merino Wool Bottoms - Dark Olive
$199
Quince
4.9 (92)100% Merino Wool Cold Weather Base Layer Bottoms
$54.90
Arc'teryx
Rho SV Bottom Men's
$120
Evo
Helly Hansen Lifa Merino Midweight Base Layer Pants
$84
Aether Apparel
Premium Merino Base Layer Pant
$125
Decathlon
Forclaz Men's MT500 Merino Wool Base Layer Tights
$79.99
REI
4.3 (7)Icebreaker 200 ZoneKnit Merino Thermal Base Layer Leggings - Men's
$109.73
REI
5.0 (5)Icebreaker 200 Sonebula Leggings - Men's
$89.73
Carhartt
4.0 (1)Men's Base Layer Thermal Pants - Carhartt Force® - Heavyweight - Synthetic Wool-Blend Fleece
$71.99
Carhartt
4.1 (66)Men's Base Layer Thermal Pants - Carhartt Force® - Midweight
$38.99
Here are solid men’s hiking-ready thermal base layers (merino + performance synthetics), including leggings and crew tops.
Base layer weight?
Lightweight
Midweight
Heavyweight
Material preference?
Merino Wool
Synthetic (Poly/Spandex)
Wool Blend
What do you need?
Bottoms (leggings)
Top (crew/zip)
Set (top + bottom)
SuggestionsShow me midweight merino bottoms for hiking
I want a full base layer set (top + bottom)
Heavyweight options for cold weather hikes
Synthetics only—quick-dry and budget-friendly
Help me choose the right weight for my temps
