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.

SmartWool NTS Microweight 150 Pattern Crew Top for Men

SKU: SMTMWPCM

  • Jersey Knit Construction
  • Flatlock Seam Design
  • Form Fit
  • Stripe Tape Binding

List: $80.00 $20.05 (25%)

Your Price: $59.95
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List: $105.00 $25.01 (24%)

Your Price: $79.99
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In Stock + Wish list

List: $105.00 $25.01 (24%)

Your Price: $79.99
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SmartWool NTS Microweight 150 Pattern Crew Top for Women

SKU: SMTMWPCW

  • Soft, Non-Irritating Material
  • Shaped Bottom Hem
  • Lightweight
  • UPF Rating Of 30

Regular: $69.99 $25.00 (36%)

Your Price: $44.99
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List: $139.99 $34.99 (25%)

Your Price: $105.00
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List: $85.00 $22.05 (26%)

Your Price: $62.95
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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: $85.00 $20.01 (24%)

Your Price: $64.99
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SmartWool Midweight 250 Bottom for Kids

SKU: SMTKB

  • Form fitting
  • Interlock knit
  • Elastic waistband
  • Flatlock seam construction

Regular: $49.99 $15.00 (30%)

Starting at: $34.99
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SmartWool NTS Micro 150 Crew for Men

SKU: SMTCRM

  • Form fitting Jersey knit
  • Crew neck, set-in sleeves
  • Shoulder panels
  • Flatlock seam construction

List: $74.95 $17.96 (24%)

Starting at: $56.99
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List: $119.99 $30.00 (25%)

Your Price: $89.99
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SmartWool Midweight Crew Top for Men

4.5
(4 reviews)
Ratings Distribution
  • 5 Stars
     
    (3)
  • 4 Stars
     
    (0)
  • 3 Stars
     
    (1)
  • 2 Stars
     
    (0)
  • 1 Stars
     
    (0)

SKU: SMTMDCM

  • 100% Merino Wool
  • Form Fit
  • Crew neck with set-in sleeves
  • Shoulder panels
  • Flatlock seam construction

Regular: $85.99 $37.99 (44%)

Starting at: $48.00
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List: $109.99 $27.00 (25%)

Your Price: $82.99
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SmartWool Midweight Zip T for Women

SKU: SMTMZTW

  • 100% Merino Wool
  • Form fit
  • 12 in. center front zip
  • Back Body Seam
  • Flatlock seam construction eliminates chafing

List: $100.00 $25.05 (25%)

Your Price: $74.95
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List: $75.00 $18.01 (24%)

Your Price: $56.99
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SmartWool Midweight Bottom for Women

SKU: SMTMBW

  • Fabric Covered Elastic Waistband
  • 100% Merino Wool
  • Form Fit - Natural Rise
  • Interlock Knit
  • UPF 50+

List: $94.95 $26.00 (27%)

Starting at: $68.95
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SmartWool Midweight Bottom for Men

SKU: SMTMBM

  • Form Fit 
  • UPF 50+
  • Traditional fly design
  • Flatlock seam construction 
  • Two color choices

List: $95.00 $25.01 (26%)

Your Price: $69.99
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Regular: $85.99 $26.00 (30%)

Your Price: $59.99
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Regular: $79.99 $24.00 (30%)

Your Price: $55.99
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List: $99.99 $24.99 (25%)

Your Price: $75.00
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