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

Polarmax Powerskins By XGO Long Sleeve Crew Shirt for Men

SKU: PMXPSLCM

  • Anti microbial
  • Won't shrink, pick, fade
  • Durable, breathable
  • Four way stretch

Regular: $27.95 $1.00 (4%)

Your Price: $26.95
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Polarmax Double Base Layer Crew for Women

4.0 (2 reviews)
Ratings Distribution
  • 5 Stars
     
    (0)
  • 4 Stars
     
    (2)
  • 3 Stars
     
    (0)
  • 2 Stars
     
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  • 1 Stars
     
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SKU: PMXDBLCW

  • Stretches
  • Quick Drying
  • Scent Prevent Anti-Microbial
  • Relaxed Fit Flat Seams
  • Feels like cotton

Your Price: $20.95
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Sale

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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Sale

Regular: $80.00 $30.05 (38%)

Your Price: $49.95
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Sale

ColdPruf Premium Performance 89 Crew for Men

SKU: CLDPPCM

  • Single layer engineering
  • Polyester, spandex
  • Max dryness, antimicrobial
  • Trim fit

Regular: $20.99 $3.00 (14%)

Starting at: $17.99
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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: $28.95
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Sale

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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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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Icebreaker Midweight Tech Top Long Sleeve Crewe for Men

SKU: ICBMTLCM

  • Odor resistant
  • Breathable
  • Merino wool
  • Offset shoulders
  • Midweight

Your Price: $99.99
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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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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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Minus33 Yukon Expedition Weight Crew Neck for Men

SKU: MINECM

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

List: $95.99 $14.00 (15%)

Your Price: $81.99
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Marmot ThermalClime Pro LS 1/2-Zip for Men

SKU: MRMTP2ZM

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

Your Price: $60.00
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Sale

Regular: $11.99 $2.00 (17%)

Starting at: $9.99
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Sale

Columbia Midweight II Long Sleeve Half Zip for Women

SKU: COLM2HZW

  • Advanced thermal reflective
  • Moisture wicking capabilities
  • Active fit
  • Antimicrobial

Regular: $50.00 $25.05 (50%)

Your Price: $24.95
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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

Terramar Men's Helix Long-Sleeve Poly Crew Shirt

5.0 (2 reviews)
Ratings Distribution
  • 5 Stars
     
    (2)
  • 4 Stars
     
    (0)
  • 3 Stars
     
    (0)
  • 2 Stars
     
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  • 1 Stars
     
    (0)

SKU: TRMMHC

  • Lightweight Temperature-Control Layer
  • Highly Breathable and Fast-Drying
  • Non-Sticky
  • 100% Micro Denier Polyester
  • Anti-microbial

Regular: $12.95 $3.00 (23%)

Your Price: $9.95
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Sale

SmartWool Kids Crew

SKU: SMTKC

  • Form fitting
  • Interlock knit
  • UPF 50+
  • Crew neck

Regular: $49.99 $15.00 (30%)

Starting at: $34.99
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Polarmax Powerskins by XGO Short Sleeve Crew Shirt for Men

SKU: PMXPSSCM

  • Anti microbial
  • Won't shrink, pick, fade
  • Durable, breathable
  • Four way stretch

Your Price: $24.95
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Sale

Regular: $60.00 $25.05 (42%)

Your Price: $34.95
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