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

ColdPruf Authentic 93 Crew for Men

SKU: CLDACM

  • Two layer engineering
  • Natural warmth barrier
  • Tagless
  • Flat seams

Regular: $20.99 $2.00 (10%)

Starting at: $18.99
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Sale

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 $5.00 (11%)

Starting at: $40.99
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Terramar Women's Thermawool 100% Merino Wool V-Neck Shirt

SKU: TRMWTWV

  • Superfine Merino Wool
  • Soft
  • Breathable
  • Moisture Management
  • Anti-microbial

Your Price: $35.95
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Sale

ColdPruf Authentic Wool Plus 92 Crew for Men

SKU: CLDAWCM

  • Ring spun cotton, Merino wool, nylon
  • Combed, ring spun cotton
  • Inner layer body heat
  • Rib knit cuffs

Regular: $22.99 $2.00 (9%)

Starting at: $20.99
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Sale

ColdPruf Basic 90 Crew for Men

SKU: CLDBCM

  • Two layer engineering
  • Natural warmth barrier
  • Tagless
  • Flat seams

Regular: $11.99 $1.00 (8%)

Starting at: $10.99
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Sale

ColdPruf Enthusiast 97 Crew for Men

SKU: CLDECM

  • 100 percent polypropylene
  • Single layer engineering
  • Lightweight, comfortable fit
  • Flat seams

Regular: $13.99 $2.00 (14%)

Starting at: $11.99
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Top Rated Gear

List: $25.95 $5.96 (23%)

Your Price: $19.99
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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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Icebreaker Tech Top Long Sleeve Midweight Crewe for Women

SKU: ICBTLMCW

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

Your Price: $99.99
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Sale

Marmot ThermalClime Sport LS Crew Shirt for Men

SKU: MRMTLSCM

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

Regular: $42.00 $17.05 (41%)

Your Price: $24.95
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Polarmax 4-Way Stretch Zip Mock for Men

4.0 (1 review)
Ratings Distribution
  • 5 Stars
     
    (0)
  • 4 Stars
     
    (1)
  • 3 Stars
     
    (0)
  • 2 Stars
     
    (0)
  • 1 Stars
     
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SKU: PMXSSZMM

  • 4-Way stretch XG fabric
  • Quick drying
  • Scent prevent anti-microbial
  • Comfortable flat seams
  • Athletic fit

Your Price: $34.95
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Sale

Mountain Hardwear Wicked Lite T-Shirt Short Sleeve for Men

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

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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Sale

Regular: $11.99 $2.00 (17%)

Starting at: $9.99
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ColdPruf Platinum Crew for Women

SKU: CLDPCW

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

Your Price: $19.99
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SmartWool NTS Micro 150 Pattern Crew for Men

SKU: SMTMPM

  • Form fitting Jersey knit
  • Crew with set-in sleeves
  • Shoulder panels
  • Flatlock seam construction

List: $79.95 $19.96 (25%)

Your Price: $59.99
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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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Top Rated Gear

List: $75.99 $11.00 (14%)

Your Price: $64.99
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Marmot ThermalClime Sport LS Crew for Women

SKU: MRMTLSCW

  • Polartec power dry
  • Upcycle product
  • Quick drying, moisture wicking
  • Stretch elastane

Your Price: $42.00
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Polarmax 4-Way Stretch Zip Mock for Women

SKU: PMXSSZMW

  • 4-Way stretch XG fabric
  • Quick drying
  • Scent prevent anti-microbial
  • Comfortable flat seams
  • Athletic fit

Your Price: $34.95
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In Stock + Wish list