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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.

Top Rated Gear

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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Sale

Mountain Hardwear MicroChill Zip T for Men

5.0
(2 reviews)
Ratings Distribution
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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 $20.05 (36%)

Starting at: $34.95
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Sale

Regular: $19.99 $5.00 (25%)

Starting at: $14.99
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Top Rated Gear

Mammut Go Dry Longsleeve Baselayer Shirt for Women

5.0
(1 review)
Ratings Distribution
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    (1)
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SKU: MMTGDLSW

  • Stretch material with waffle backing
  • Contoured cut
  • Fast drying
  • Antimicrobial feature
  • Ultraviolet protection factor (UPF) 20+

List: $55.00 $6.00 (11%)

Starting at: $49.00
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Terramar Men's Helix Short-Sleeve Polyester Crew T-Shirt

5.0
(2 reviews)
Ratings Distribution
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    (2)
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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: $14.95 $6.00 (40%)

Starting at: $8.95
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Top Rated Gear

Polarmax Core-4 Tech Fleece Crew for Men

5.0
(1 review)
Ratings Distribution
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    (1)
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SKU: PMXC4TCM

  • 4-way power stretch fabric
  • Brushed fleece interior
  • Acclimate dry moisture wicking
  • Athletic fit

Your Price: $43.95
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Regular: $11.99 $2.00 (17%)

Starting at: $9.99
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Top Rated Gear

SmartWool Midweight Crew Top for Men

4.5
(4 reviews)
Ratings Distribution
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    (3)
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    (0)
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SKU: SMTMDCM

  • 100% Merino Wool
  • Form Fit
  • Crew neck with set-in sleeves
  • Shoulder panels
  • Flatlock seam construction

List: $95.00

Your Price: $94.95
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Top Rated Gear

Terramar Men's Thermolator II Crew with Mesh Shirt

4.5
(4 reviews)
Ratings Distribution
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    (2)
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    (2)
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SKU: TRMMT2C

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

Your Price: $24.95
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Sale

Regular: $35.00 $17.05 (49%)

Your Price: $17.95
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Sale

Regular: $49.00 $32.05 (65%)

Your Price: $16.95
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List: $65.99 $9.50 (14%)

Your Price: $56.49
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Your Price: $41.95
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Polarmax Double Base Layer Crew for Women

4.0
(2 reviews)
Ratings Distribution
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    (0)
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    (2)
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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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Mountain Hardwear Double Wicked Short Sleeve T for Men

2.0
(1 review)
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SKU: MHWDWSM

  • Antimicrobial finish, Controls Odour
  • Apparel Fit Standard
  • Flat-Look Seam Construction
  • Classic Wicking Tee, Fast Drying Fabric

Regular: $38.00 $21.05 (55%)

Your Price: $16.95
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Mammut Go Warm Longsleeve Baselayer for Women

SKU: MMTGWLW

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

Regular: $75.00 $40.05 (53%)

Starting at: $34.95
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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: $49.95 $5.00 (10%)

Starting at: $44.95
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