Base Layers & Mid Layers

SunnySports.com offers a wide variety of base, mid layers & thermal underwear to be worn in any conditions. These undergarments are sweat-resistant, quick-dry, and durable. We carry tops and bottoms from high quality brands such as Under Armour, Terramar, and SmartWool. Wearing these performance underwear underneath your outfit ensures a comfortable and dry adventure in the outdoors. Whether you're looking for leggings, tights, thermals, or a layer to keep your torso warm and dry, we have what you are looking for.

Terramar Ecolator CS Fleece Tight 3.0 for Women

SKU: TRMECT3W

  • Textured fleece
  • Moisture wicking
  • Fast drying
  • Breathable

Your Price: $25.95
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Out of Stock + Wish list

Terramar Kashmir HG Pant 1.0 for Women

SKU: TRMKHP1W

  • HG Climasense heat generating technology
  • Soft, breathable, and fast drying
  • Antimicrobial finish
  • Odor control
  • UPF rating 25+

Your Price: $16.95
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Polarmax Comp-4 Tech Fleece Tights for Men

SKU: PMXC4TTM

  • 4-way power stretch fabric
  • Tech face
  • Brushed fleece interior
  • No shrink
  • Athletic Fit

Your Price: $38.95
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Sale

Regular: $30.00 $13.05 (44%)

Your Price: $16.95
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Out of Stock + Wish list

Polarmax Comp-4 Tech Fleece Tights for Women

SKU: PMXC4TTW

  • 4-way power stretch fabric
  • Tech face
  • Brushed fleece interior
  • Anti-microbial / anti-odor protection
  • Flat seam construction

Your Price: $38.95
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Polar Max Tech Silk Weight Pants for Men

SKU: PMXTSWPM

  • Scent prevent anti-microbial
  • 100% Acclimate dry performance fabric
  • All-season wear
  • Light weight technical silk knit
  • Single layer-flat seam construction

Your Price: $18.95
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Terramar Men's Helix Poly Half-Zip Shirt

SKU: TRMMHTLRBK

  • Lightweight Temperature-Control Layer
  • Highly Breathable and Fast-Drying
  • Will Not Cling to Your Skin
  • 100% Micro Denier Polyester
  • Anti-microbial

Your Price: $14.95

Out of Stock + Wish list

Sale

ColdPruf Performance 58 Pants for Women

SKU: CLDPRPW

  • Single layer engineering
  • Max dryness, antimicrobial
  • Moisture management
  • Polyester, spandex

Regular: $18.99 $2.00 (11%)

Starting at: $16.99
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Minus33 Tanana Expedition Weight Crew Neck for Women

SKU: MINECW

  • Merino wool
  • Interlock construction
  • Flat lock seams
  • Machine washable

List: $95.99 $14.00 (15%)

Your Price: $81.99
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Minus33 Denali Expedition Weight Full Zip Top for Men

SKU: MINEFM

  • Merino wool
  • Interlock construction
  • Flat lock seams
  • Rib knit cuffs

List: $119.99 $18.00 (15%)

Your Price: $101.99
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ColdPruf Premium Performance 49 Crew for Women

SKU: CLDPPCW

  • Single layer engineering
  • Polyester, spandex
  • Max dryness, antimicrobial
  • Trim fit

Regular: $20.99 $6.00 (29%)

Starting at: $14.99
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Marmot ThermalClime Pro LS 1/2-Zip for Men

SKU: MRMTP2ZM

  • Quick drying
  • Moisture wicking
  • Stretch elastane
  • Flat lock seams

Your Price: $60.00
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Minus33 Kobuk Expedition Weight 1/4 Zip Top for Men

SKU: MINEQM

  • Mock neck
  • Zip for venting
  • Merino wool
  • Interlock construction

List: $110.99 $16.50 (15%)

Your Price: $94.49
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Minus33 Merino Wool Mid Weight Bottoms for Men

SKU: MINMWBM

  • 100% 18.5 Micron Merino Wool
  • 230 g/m2 Interlock knit construction
  • Flat lock seams

List: $65.99 $9.50 (14%)

Your Price: $56.49
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Sale

Regular: $55.00 $25.05 (46%)

Your Price: $29.95
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Polarmax Double Base Layer Crew for Men

SKU: PMXDBLCM

  • Stretches
  • Wicks
  • Quick drying
  • Breathes
  • Scent prevent anti-microbial

Your Price: $20.95
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Sale

ColdPruf Premium Performance 89 Pants for Men

SKU: CLDPPPM

  • Single layer engineering
  • Polyester, spandex
  • Max dryness, antimicrobial
  • Trim fit

Regular: $20.99 $2.00 (10%)

Starting at: $18.99
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Sale

Mammut Go Dry Longsleeve Baselayer Shirt for Women

5.0 (1 review)
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SKU: MMTGDLSW

  • Stretch material with waffle backing
  • Contoured cut
  • Fast drying
  • Antimicrobial feature
  • Ultraviolet protection factor (UPF) 20+

Regular: $49.00 $19.05 (39%)

Starting at: $29.95
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Sale

Outdoor Research Frescoe Henley for Women

SKU: ORSFRHW

  • Dri-release E.C.O. fabric
  • Lightweight and Button front
  • Built-in FreshGuard odor neutralization
  • Button front

Regular: $48.00 $28.05 (58%)

Your Price: $19.95
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Marmot ThermalClime Pro Boot Tight for Men

SKU: MRMTPBTM

  • Flat locked seams
  • Gusseted crotch
  • Recycled polyester
  • Polartec technology

Your Price: $42.00
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