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 Chocorua Men's Mid-Weight Crew

SKU: MINMWCM

  • 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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Ibex Woolies 3 Pullover for Women

SKU: IBX3PW

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

Your Price: $115.00
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List: $65.99 $9.50 (14%)

Your Price: $56.49
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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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Ibex Woolies 1 Crew Stripe for Men

SKU: IBX15M

  • Breathable
  • Anti-odor
  • Raglan sleeves
  • Flatlock seams

Your Price: $85.00
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Terramar Ecolator CS Fleece Half-Zip 3.0 for Women

SKU: TRMECH3W

  • Comfort in all seasons
  • Antimicrobial
  • Heavyweight
  • Breathable

Your Price: $38.95
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Polarmax Core 3.0 LongSleeve Crew Mens

SKU: PMXC3LCM

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $44.95
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Terramar Ecolator CS Fleece Scoop 3.0 for Women

SKU: TRMECS3W

  • Comfort in all seasons
  • Antimicrobial
  • Heavyweight
  • Breathable

Your Price: $31.95
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Regular: $19.99 $5.00 (25%)

Starting at: $14.99
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ColdPruf Classic 170 Silk Weight Merino Wool Crew for Women

SKU: CLDCCW

  • Single layer jersey knit
  • Silk weight
  • Merino wool
  • Tagless, flat seams

Regular: $45.99 $11.00 (24%)

Starting at: $34.99
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Polarmax Core 3.0 LongSleeve Crew Womens

SKU: PMXC3LCW

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $44.95
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Top Rated Gear

List: $75.99 $11.00 (14%)

Your Price: $64.99
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Under Armour Base 2.0 Crew for Men

SKU: UNAB2CM

  • Mid-weight protection
  • Soft, brushed interior
  • 4-way stretch fabrication
  • Moisture transport system

Regular: $37.95

Starting at: $36.95
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SmartWool NTS Midweight 250 Pattern Crew for Women

SKU: SMTRPW

  • Body enhancing fit
  • Flatlock seams
  • Offset shoulder panels
  • Interlock knit

Your Price: $105.00
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ColdPruf Platinum Crew for Women

SKU: CLDPCW

  • Polyester
  • Flat Seams
  • Ring Spun Yarns
  • Thermachoice System

Regular: $19.99 $3.00 (15%)

Starting at: $16.99
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SmartWool NTS Midweight 250 Color Block Crew for Men

SKU: SMTCBM

  • Set-in sleeves
  • Flatlock seams
  • Form fit
  • Interlock knit

Your Price: $105.00
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Polarmax Core 4.0 LongSleeve Crew Mens

SKU: PMXC4CLM

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $49.95
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SmartWool NTS Micro 150 Crew for Women

SKU: SMTCRW

  • Form fitting Jersey knit
  • Stretch stitching
  • Side seams wrap to front
  • Tagless comfort

Your Price: $74.95
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Mountain Hardwear MicroChill Zip T for Men

5.0
(2 reviews)
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SKU: MHWMCZMN

  • Center Back Length: 28.5 in. / 72 cm.
  • Flat-lock construction
  • High-cut collar
  • Flat-lock construction
  • Velous Micro Fleece

Regular: $55.00 $20.05 (36%)

Starting at: $34.95
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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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