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.

Sale

Under Armour Coldgear Infrared Devo Crew for Men

SKU: UNACIDCM

  • Dual layer fabric
  • ColdGear infrared tech
  • 4 way stretch
  • Moisture transport

Regular: $48.95 $4.00 (8%)

Starting at: $44.95
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Top Rated Gear

List: $75.99 $11.00 (14%)

Your Price: $64.99
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Sale

Mountain Hardwear Wicked Lite T-Shirt Short Sleeve for Women

SKU: MHWWLSWN

  • Wicking, fast drying fabric
  • Antimicrobial finish controls odor
  • Flat-lock seam construction eliminates chafe
  • Reflective trim for visibility
  • MHW classic wicking tee

Regular: $35.00 $19.05 (54%)

Your Price: $15.95
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SmartWool Midweight Crew Top for Women

SKU: SMTMDCW

  • Upf 50+ protection
  • Back Body Seam Wraps
  • Shoulder Panels
  • Flatlock Seam Construction 
  • Heat Transfer Logo

List: $95.00 $25.01 (26%)

Your Price: $69.99
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Under Armour Coldgear Infrared Evo Cg Mock for Men

SKU: UNACIECM

  • Dual-layer fabric 
  • Thermo-conductive inner coating 
  • 4-Way Stretch fabrication 
  • Moisture transport system 
  • Quick-dry fabrication 

List: $54.99 $17.04 (31%)

Your Price: $37.95
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SmartWool Midweight Pattern Crew Top for Women

SKU: SMTMPCW

  • 100% Merino Wool
  • Form Fitting 
  • Jacquard Knit 
  • Back Body Seam
  • Shoulder Panels

List: $105.00 $27.01 (26%)

Your Price: $77.99
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Sale

Mountain Hardwear MicroChill Zip T for Men

5.0 (2 reviews)
Ratings Distribution
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  • 1 Stars
     
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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 $22.05 (40%)

Your Price: $32.95
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Sale

ColdPruf Classic 170 Silk Weight Merino Wool Crew for Men

SKU: CLDCCM

  • Merino wool
  • 5 ounce silk weight
  • Single layer jersey knit
  • Tagless, flat seams

Regular: $46.99 $5.00 (11%)

Your Price: $41.99
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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 Men's Thermolator II Mock

SKU: TRMMT2M

  • Brushed polyester
  • 4 way stretch
  • Climasense fabric
  • Mesh ventilation panels

Your Price: $18.95
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Sale

Marmot Windridge Short Sleeve Shirt for Men

SKU: MRMWSSM

  • Ultraviolet protection factor (UPF) 50
  • Knit, polyester fabric
  • Tag-free neckline
  • Flat-locked seams
  • Mesh panels

Regular: $30.00 $10.05 (34%)

Starting at: $19.95
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List: $85.00 $22.05 (26%)

Your Price: $62.95
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Minus33 Merino Wool Mid Weight Crew Neck for Men

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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Sale

Mountain Hardwear Tephra Trek T-Shirt Short Sleeve for Women

SKU: MHWTTSTW

  • Wick Q EVAP
  • Fast drying
  • Stretch fabric
  • Seams rotated away from pressure points
  • Antimicrobial finish

Regular: $55.00 $32.05 (58%)

Your Price: $22.95
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Minus33 Kinsman MidWeight Turtleneck for Men

SKU: MINMTM

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

List: $75.99 $11.00 (14%)

Your Price: $64.99
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Top Rated Gear

List: $89.99 $13.50 (15%)

Your Price: $76.49
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Polar Max Performance Tech Silk Crew for Men

SKU: PMXPSCM

  • Lightweight mesh
  • Anti microbial
  • Wicks moisture
  • Stretchable, flexible

Your Price: $21.95
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Sale

Regular: $30.00 $13.05 (44%)

Your Price: $16.95
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Out of Stock + Wish list