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.

Minus33 Yukon Expedition Weight Crew Neck for Men

SKU: MINECM

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

List: $95.99 $24.00 (25%)

Your Price: $71.99
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Marmot ThermalClime Pro Tight for Men

SKU: MRMTPTM

  • Flat locked seams
  • Gusseted crotch
  • Moisture wicking
  • Quick drying

Your Price: $45.00
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Polarmax Double Base Layer Crew for Women

4.0
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SKU: PMXDBLCW

  • Stretches
  • Quick Drying
  • Scent Prevent Anti-Microbial
  • Relaxed Fit Flat Seams
  • Feels like cotton

Your Price: $20.95
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SmartWool Midweight Zip T for Men

SKU: SMTMZM

  • 100% Merino Wool
  • Form fit
  • 10 in. center front zip
  • Flatlock seam construction eliminates chafing
  • Shoulder panels

Regular: $85.99 $30.00 (35%)

Starting at: $55.99
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List: $99.99 $25.00 (25%)

Your Price: $74.99
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Columbia Mountain Tech II Long Sleeve Top for Men

SKU: COLMTLSM

  • Antimicrobial treatment
  • Omni-Wick
  • UPF 15
  • 4 way stretch
  • Polyester jersey

Regular: $35.00 $18.05 (52%)

Your Price: $16.95
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Terramar Women's Thermawool CS 4.0 Crew

SKU: TRMWTW4C

  • Climasense fabric
  • Advanced odor control
  • Wicking, fast drying
  • Retains heat, breathable

Your Price: $26.95
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List: $99.99 $25.00 (25%)

Your Price: $74.99
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Top Rated Gear

List: $89.99 $13.50 (15%)

Your Price: $76.49
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Mammut Long Pants Warm-Quality Thermal Underwear for Men

SKU: MMTLPWQM

  • Fast drying
  • Antimicrobial feature
  • Material: 83% Polyester, 17% Wool
  • Body zone fabric design

Regular: $80.00 $45.05 (56%)

Your Price: $34.95
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ColdPruf Platinum Bottom for Women

SKU: CLDPBW

  • CPT Fiber technology
  • Two-layer engineering
  • Traps air between layers
  • Inside: 100% CPT Performance polyester
  • Outside: 70% polyester, 30% merino wool

Your Price: $19.99
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Adidas Techfit 3/4 3-Stripe Tight for Women

SKU: ADS34T3S

  • Compression fit
  • Moisture wicking
  • Flat seams

Regular: $40.00 $15.05 (38%)

Your Price: $24.95
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Marmot Trail Breeze 3/4 Tight for Women X-Small Dark Steel

SKU: MRMB3TW

  • Polygiene technology finish
  • Ultraviolet protection factor 30
  • Mesh paneling
  • Compression fit
  • Coolmax interior gusset liner

Regular: $65.00 $40.05 (62%)

Your Price: $24.95
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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 $24.00 (25%)

Your Price: $71.99
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Coldpruf Extreme Performance Crew for Men

SKU: CLDEPCM

  • CPT Fiber Technology
  • Two-Layer Engineering
  • Traps Air Between Layers
  • 96% CPT Performance Polyester
  •  4% Spandex

Regular: $30.99 $9.00 (29%)

Starting at: $21.99
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Minus33 Merino Wool MidWeight Crew Neck - Men's

Mossy Oak Infinity

SKU: MINMCMMO

  • Merino wool
  • Interlock knit construction
  • Flat lock seams
  • Machine wash, dry

List: $80.99 $12.00 (15%)

Your Price: $68.99
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Terramar Ecolator CS Fleece Scoop 3.0 for Women

SKU: TRMECS3W

  • Comfort in all seasons
  • Antimicrobial
  • Heavyweight
  • Breathable

Your Price: $25.95
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