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Filson > Apparel > Men's Apparel > Men's Base Layer >

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Outfit yourself in the right clothes for your next adventure. Our rainwear and outerwear will keep you dry and warm, while our baselayers help you prepare for changing temps. You'll find performance and tactical clothes from Beretta, Under Armour and 5.11 Tactical, fishing clothes from Columbia, and more apparel from The North Face, Marmot, and Carhartt.

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Under Armour Men's The Original 9" Boxerjock Boxer Briefs

Under Armour Men's The Original 9" Boxerjock Boxer Briefs

Key Features
  • 90% polyester, 10% elastane HeatGear fabric

  • Four-way stretch properties for increased mobility

  • Signature Moisture Transport System wicks sweat

  • ArmourBlock antimicrobial technology fights odors

  • Smooth flatlock seams help reduce chafing

2 colors available
$19.99 - $24.99
Under Armour Men's The Original 6" Boxerjock

Under Armour Men's The Original 6" Boxerjock

Key Features
  • 4-way stretch 88% polyester, 12% elastane

  • HeatGear technology: cool, dry, and light

  • Superior moisture transport

  • ArmourBlock anti-odor technology helps reduce odor

  • Tagless interior

3 colors available
$19.99 - $24.99
Terramar Men's Thermawool Merino Wool 1/2-Zip Shirt

Terramar Men's Thermawool Merino Wool 1/2-Zip Shirt

Key Features
  • 100% Merino Wool

  • Naturally controls temperature and fights odor

  • UPF 50+

  • 180g: medium weight

  • Constructed from an annually renewable resource

$68.00
Browning Men's NTS Upland Shirt

Browning Men's NTS Upland Shirt

Key Features
  • NTS (Next To Skin) base layer fabric technology

  • OdorSmart encapsulated silver ion technology

  • VisaEndurance antimicrobial treatment

  • Wicks away moisture for quick evaporation

$39.99 - $44.99
Terramar Men's Thermawool Merino Wool Long-Sleeve Crew Shirt

Terramar Men's Thermawool Merino Wool Long-Sleeve Crew Shirt

Key Features
  • 100% no-itch Merino Wool

  • Naturally controls temperature and fights odor

  • UPF 50+

  • 180g: medium weight

  • Constructed from an annually renewable resource

$65.00
Terramar Men's Thermawool Merino Wool Pant

Terramar Men's Thermawool Merino Wool Pant

Key Features
  • 100% no-itch Merino Wool

  • Naturally controls temperature and fights odor

  • UPF 50+

  • 180g: medium weight

  • Constructed from an annually renewable resource

$65.00
Scent-Lok Men's Perfect Panel BaseSlayers Pant

Scent-Lok Men's Perfect Panel BaseSlayers Pant

Key Features
  • High-loft fleece in areas most prone to wind/cold

  • Lighter-weight camo fabric in high-movement areas

  • Antimicrobial-treated; activated carbon technology

  • Flatlock seam construction for added comfort

  • Form-fitting design for ease of movement

$99.99
$59.96
Under Armour Men's ColdGear Infrared EVO Mock-Neck Shirt

Under Armour Men's ColdGear Infrared EVO Mock-Neck Shirt

Key Features
  • 87% polyester, 13% elastane ColdGear fabric

  • Slick, fast-drying exterior; soft, cozy interior

  • Four-way stretch fabrication for maximum mobility

  • Signature Moisture Transport System wicks sweat

  • ColdGear Infrared printed interior traps heat

4 colors available
$54.99 - $59.99
Terramar Men's Authentic 2-Layer Thermal Bottom

Terramar Men's Authentic 2-Layer Thermal Bottom

Key Features
  • Rapid moisture-management technology

  • 2-layer construction for optimum insulation

  • Antimicrobial-treated to help reduce odor

  • ec2 Qwik-Dri Thermoregulation Comfort Technology

  • 100% polyester fabric

$24.99 - $29.99
Scent-Lok BaseSlayers Performance Pant, Black

Scent-Lok BaseSlayers Performance Pant, Black

Key Features
  • Perfect for mid-season hunts

  • Exceptional moisture-wicking properties

  • Helps reduce scent

  • Single-layer, four-way stretch fabric

  • Stays put without resistance at full draw

$59.99 - $69.99
$29.92
Under Armour Men's Base 3.0 1/4-Zip Shirt

Under Armour Men's Base 3.0 1/4-Zip Shirt

Key Features
  • 7-oz. 93% polyester, 7% elastane w/4-way stretch

  • Base 3.0: max warmth for "extreme" cold conditions

  • ColdGear technology: warm, dry, and light

  • ArmourBlock anti-odor technology helps reduce BO

  • Ergonomic flatlock seams and raglan sleeves

$84.99 - $94.99
Scent-Lok Level One Heavyweight Mock Tee

Scent-Lok Level One Heavyweight Mock Tee

Key Features
  • Soft and fleecy interior

  • Smooth and silky exterior

  • Antimicrobial treatment reduces odors

  • Wicks moisture

  • Highly breathable

$39.99 - $44.99
Under Armour Long-Sleeve Mock With Capture Scent Technology

Under Armour Long-Sleeve Mock With Capture Scent Technology

Key Features
  • Nylour, PolyArmour, elastane

  • ColdGear double-knit fabric

  • Capture Scent Technology

  • Moisture-wicking properties

  • Compression fit

$74.99
Terramar Men's Authentic 2-Layer Long-Sleeve Thermal Crew Shirt

Terramar Men's Authentic 2-Layer Long-Sleeve Thermal Crew Shirt

Key Features
  • Rapid moisture-management technology

  • 2-layer construction for optimum insulation

  • Antimicrobial-treated to help reduce odor

  • ec2 Qwik-Dri Thermoregulation Comfort Technology

  • 100% polyester fabric

$24.99 - $29.99
Terramar Tech Skins Pant

Terramar Tech Skins Pant

Key Features
  • Rapid moisture-management technology

  • Spun rib construction for added comfort

  • Flatlock seams to elminate chafing

  • Double-knit flat back mesh construction

  • 100% polypropylene fabric

$19.99 - $22.99
Terramar Men's 2-Layer Merino Wool Long-Sleeve Crew Shirt

Terramar Men's 2-Layer Merino Wool Long-Sleeve Crew Shirt

Key Features
  • Thermal layers trap warm air to keep you warm

  • UPF 50+

  • ec2 Qwik-Dri Thermoregulation Technology

  • 180g: medium weight

  • Ribbed spandex trim

$38.50
$29.99 - $34.99
Under Armour Men's EVO ColdGear Mock-Neck Shirt

Under Armour Men's EVO ColdGear Mock-Neck Shirt

Key Features
  • Fitted very close to the body

  • ArmourBlock odor-reduction technology

  • UPF 30+ sun protection rating

  • Two-layer brushed fabric

3 colors available
$49.99 - $54.99
Ol' Tom Cool Breeze Moisture Management Bottoms

Ol' Tom Cool Breeze Moisture Management Bottoms

Key Features
  • Ultimate base layer for wicking moisture

  • Keeps you warm or cool and dry

  • 100% polyester, 160 gram fabric

  • uninhibited range of motion

  • Resists pilling

$26.99
Under Armour Men's ColdGear Infrared EVO Legging

Under Armour Men's ColdGear Infrared EVO Legging

Key Features
  • 87% polyester, 13% elastane ColdGear fabric

  • Slick, fast-drying exterior; soft, cozy interior

  • Four-way stretch fabrication for maximum mobility

  • Signature Moisture Transport System wicks sweat

  • ColdGear Infrared printed interior traps heat

2 colors available
$54.99 - $59.99
Ice Armor Base Layer Bottom, Merino Wool Blend

Ice Armor Base Layer Bottom, Merino Wool Blend

Key Features
  • Super comfortable to wear

  • Rib cuff

  • Anti-microbial technology

  • 50% Merino wool/50% polyester

4 models to choose from
$54.99

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