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

Terramar Men's Helix Short-Sleeve Polyester Crew T-Shirt

5.0
(1 review)
Ratings Distribution
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SKU: TRMMHS

  • ec2 Qwik-Dri Thermoregulation Comfort Technology
  • Anti-Microbial Fabric
  • Air pockets for Improved Insulation
  • Soft, Breathable and Fast-Drying
  • UPF Rating 25+

Regular: $11.95 $3.00 (25%)

Starting at: $8.95
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Sale

Terramar Men's Helix Long-Sleeve Poly Crew Shirt

5.0
(2 reviews)
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    (2)
  • 4 Stars
     
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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

ColdPruf Basic 50 Pants for Women

SKU: CLDBPW

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

Regular: $11.99 $2.00 (17%)

Starting at: $9.99
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Sale

Regular: $11.99 $2.00 (17%)

Starting at: $9.99
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Sale

ColdPruf Basic 90 Pants for Men

SKU: CLDBPM

  • 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 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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Sale

ColdPruf Enthusiast 97 Pants for Men

SKU: CLDEPM

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

Regular: $13.99 $1.00 (7%)

Starting at: $12.99
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Sale

Under Armour Original Boxerjock Brief 9"

SKU: UNAOB9M

  • Lightweight fabric
  • 4 way stretch
  • Moisture wicking
  • Anti odor technology

Your Price: $13.95
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Sale

Mountain Hardwear Super Power Arm Warmer for Men - Black

SKU: MHWSPAWN

  • Body: Super Power Brushed jersey
  • Stretch fabric
  • Tonal reflective print
  • Wicking, fast drying
  • Flat-lock seam construction

Regular: $30.00 $16.05 (54%)

Your Price: $13.95
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Sale

ColdPruf Expedition 85 Crew for Men

SKU: CLDEXCM

  • 100 percent polyester fleece
  • Moisture management
  • Single-layer engineering
  • Tagless

Regular: $15.99 $2.00 (13%)

Starting at: $13.99
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Sale

ColdPruf Expedition 85 Pants for Men

SKU: CLDEXPM

  • 100 percent polyester fleece
  • Moisture management
  • Single-layer engineering
  • Tagless

Regular: $15.99 $2.00 (13%)

Starting at: $13.99
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Your Price: $13.99

In Stock + Wish list

Sale

Terramar Trailhead TR Half-Zip 1.0 Crew for Men - Black

SKU: TRMT1ZM

  • Color: black
  • Material: 100% micro polyester
  • Two-sided knit construction
  • Antimicrobial feature
  • Flat-seam construction

Regular: $15.95 $1.00 (6%)

Starting at: $14.95
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Terramar Men's Helix Poly Half-Zip Shirt

SKU: TRMMHTLRBK

  • Lightweight Temperature-Control Layer
  • Highly Breathable and Fast-Drying
  • Will Not Cling to Your Skin
  • 100% Micro Denier Polyester
  • Anti-microbial

Your Price: $14.95

Out of Stock + Wish list

Sale

Mountain Hardwear Ediza Short Sleeve Shirt for Women

5.0
(1 review)
Ratings Distribution
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    (1)
  • 4 Stars
     
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SKU: MHWESSW

  • 25 UPF sun protection
  • Antimicrobial finish
  • 25 in. central back length
  • Flat-lock seam construction
  • Panels over shoulders

Regular: $38.00 $23.05 (61%)

Your Price: $14.95
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Sale

Terramar Men's Thermolator II Pants

5.0
(1 review)
Ratings Distribution
  • 5 Stars
     
    (1)
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SKU: TRMMT2P

  • 86% Micro-Polyester and 14% Spandex
  • ec2 Qwik-Dri Thermoregulation Comfort Technology
  • Two Fabric Jersey and Mesh Construction
  • Anti-microbial
  • Fabric Weight: 180 grams (5.36 oz.)

Regular: $17.95 $3.00 (17%)

Starting at: $14.95
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In Stock + Wish list