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 Merino Wool Lightweight Bottoms for Men

SKU: MINLBM

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

List: $59.99 $9.00 (15%)

Your Price: $50.99
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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: $75.00 $30.05 (40%)

Your Price: $44.95
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Minus33 Merino Wool Lightweight Bottoms for Women

SKU: MINLBW

  • 100% 17.5-micron Merino wool
  • 170 g/m2 jersey-knit construction
  • Flat-lock seams
  • Weight (size L): 6.1 oz. 
  • Machine-wash compatibility

List: $59.99 $9.00 (15%)

Your Price: $50.99
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Mountain Hardwear Wicked Lite T-Shirt Short Sleeve for Men

4.0 (3 reviews)
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SKU: MHWWLSMN

  • Fast drying fabric
  • Antimicrobial finish
  • Flat-lock seam construction 
  • Reflective trim
  • MHW classic design

Regular: $35.00 $17.05 (49%)

Your Price: $17.95
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Columbia Base Layer Midweight Mock Neck Long Sleeve for Men

SKU: COLBMMT

  • 85% polyester/15% elastane sweet rev.
  • Antimicrobial
  • Omni-Wick inserts
  • Omni-heat thermal reflective lining
  • Performance fit

Regular: $55.00 $30.05 (55%)

Your Price: $24.95
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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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Regular: $60.00 $25.05 (42%)

Your Price: $34.95
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Marmot ThermalClime Pro Tight for Women

SKU: MRMTPTW

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

Your Price: $45.00
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Minus33 Merino Wool Lightweight Crew for Men

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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Under Armour Coldgear Infrared Devo 1/4-Zip for Men

SKU: UNACIDZM

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

Regular: $59.95 $10.00 (17%)

Your Price: $49.95
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Mammut Go Warm T-Shirt Baselayer for Women

SKU: MMTGWTW

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

Regular: $60.00 $32.05 (53%)

Your Price: $27.95
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Polarmax Maxride Crew for Women

SKU: PMXMRCW

  • Layering piece, or wear it alone
  • Contrast stitch
  • Machine wash & dry, no shrinking
  • Lightweight rib knit
  • Anti-microbial to prevent any scent

Your Price: $17.95
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Regular: $55.00 $25.05 (46%)

Your Price: $29.95
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Minus33 Merino Wool Lightweight Crew Neck for Women

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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Regular: $150.00 $55.05 (37%)

Your Price: $94.95
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Rab MeCo 165 Long Sleeve Zip Tee for Men

SKU: RABM6LTM

  • Merino fabric
  • Chest zipper
  • Stand up collar
  • Flatlock seams

Your Price: $100.00
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Mountain Hardwear Wicked Lite T-Shirt Short Sleeve for Women

SKU: MHWWLSSWXSPU

  • Fast drying fabric
  • Natural Chitosan antimicrobial finish
  • Flat-lock seam construction
  • Center back length: 24.5 in.

Regular: $35.00 $20.05 (57%)

Your Price: $14.95

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Top Rated Gear

List: $75.99 $11.00 (14%)

Your Price: $64.99
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Outdoor Research Frescoe Henley for Women

SKU: ORSFRHW

  • Dri-release E.C.O. fabric
  • Lightweight and Button front
  • Built-in FreshGuard odor neutralization
  • Button front

Regular: $48.00 $28.05 (58%)

Your Price: $19.95
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