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.

Mammut Go Dry Zip Baselayer Longsleeve Shirt for Men

SKU: MMTGDZLSM

  • Lightweight, fast-drying
  • Anti-microbial
  • Contoured cut
  • Stretch material

Your Price: $70.00
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Mammut Go Dry Longsleeve Zip Baselayer Womens

SKU: MMTGDZW

  • All season baselayer
  • Highly technical
  • Stretchy mobility
  • Quick-drying

Regular: $70.00 $27.05 (39%)

Your Price: $42.95
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Minus33 Ticonderoga Men's Lightweight Crew

SKU: MINLCM

  • 100% 17.5-Micron-Merino wool
  • 170 g/m2 Jersey-knit construction
  • Flat-lock seams
  • Machine-washable
  • Sizes available: X-small to XXX-large

List: $59.99 $9.00 (15%)

Your Price: $50.99
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Minus33 Moriah Women's Lightweight Crew

SKU: MINLCW

  • Jersey knit construction
  • 100% Merino Wool
  • Lightweight base layer
  • Flat lock seams
  • Machine dry

List: $59.99 $9.00 (15%)

Your Price: $50.99
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SmartWool NTS Midweight 250 Crew for Women

SKU: SMTMIW

  • Midweight baselayer
  • Body enhancing fit
  • Flatlock seams
  • Moisture wicking

Your Price: $95.00
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Regular: $35.95 $19.00 (53%)

Starting at: $16.95
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SmartWool Midweight 250 Zip T for Kids

SKU: SMTMK

  • Midweight baselayer
  • Zipper with chin guard
  • Flatlock seams
  • Moisture wicking

Your Price: $59.95
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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: $34.95
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List: $65.99 $9.50 (14%)

Your Price: $56.49
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Marmot ThermalClime Sport SS Crew Shirt for Men

SKU: MRMTSSCM

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

Your Price: $35.00
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Mammut Go Warm Longsleeve Baselayer for Women

SKU: MMTGWLW

  • Contoured cut
  • Extended back
  • 100% Polyester microfiber
  • Merino wool and polyester mix
  • Antimicrobial feature

Regular: $75.00 $40.05 (53%)

Starting at: $34.95
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Ibex Woolies 3 Pullover for Men

SKU: IBX3PM

  • Breathable
  • Anti-odor
  • Raglan sleeves
  • Brushed exterior

Regular: $115.00 $40.05 (35%)

Your Price: $74.95
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Terramar Women's Thermawool CS 4.0 Half-Zip

SKU: TRMWTW4H

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

Your Price: $41.95
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Marmot ThermalClime Sport SS Crew for Women

SKU: MRMTSSCW

  • Quick drying
  • Moisture wicking
  • Water resistant elastane
  • Flat lock seams

Regular: $35.00 $12.05 (34%)

Your Price: $22.95
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Minus33 Allagash Lightweight 1/4 Length Zip for Men

SKU: MINLZM

  • Merino wool
  • Jersey knit construction
  • Flat lock seams
  • Machine washable

List: $64.99 $9.50 (15%)

Your Price: $55.49
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Ibex Woolies 3 Pullover for Women

SKU: IBX3PW

  • Breathable
  • Anti-odor
  • Raglan sleeves
  • Brushed exterior

Your Price: $115.00
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Arc'teryx RHO LT Zip Neck for Women

SKU: ARCLZNW

  • Moisture-wicking
  • Warm when wet
  • Resists odors
  • Flatlock seams

Regular: $119.00 $39.05 (33%)

Starting at: $79.95
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ColdPruf Authentic Union Suit for Men

SKU: CLDAUM

  • Two-layer engineering
  • Vertical rear flap
  • Natural warmth barrier
  • ThermaChoice System

Your Price: $42.99
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Top Rated Gear

List: $75.99 $11.00 (14%)

Your Price: $64.99
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Mammut Go Warm Longsleeve Shirt Baselayer for Men

SKU: MMTGWSM

  • Extended back
  • Contoured cut
  • Body Mapping technology
  • Polyester microfiber
  • Antimicrobial feature

Regular: $49.95 $5.00 (10%)

Starting at: $44.95
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