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.

Terramar Thermasilk Filament Jersey Silk Crew Shirt for Men

SKU: TRMMSC

  • 100% Supersoft Pure Filament Jersey Silk
  • ec2 Qwik-Dri Thermoregulation Comfort Technology
  • Lightweight
  • Durable
  • Fabric Weight: 75 grams (2.6 oz.)

List: $38.95 $3.00 (8%)

Starting at: $35.95
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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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  • 3 Stars
     
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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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Terramar Men's Thermolator II Half-Zip with Mesh Shirt

SKU: TRMMT2H

  • 86% Micro-Polyester and 14% Spandex
  • Qwik-Dri Thermoregulation Comfort Technology
  • Two Fabric Jersey and Mesh Construction
  • Ergonomic Zipper Pull
  • Anti-microbial

List: $31.95 $4.00 (13%)

Starting at: $27.95
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Ibex Woolies 1 Crew for Men

SKU: IBXW1M

  • Breathable
  • Anti-odor
  • Raglan sleeves
  • Flatlock seams

Regular: $80.00 $30.05 (38%)

Your Price: $49.95
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Terramar Men's Thermolator II Mock

SKU: TRMMT2M

  • Brushed polyester
  • 4 way stretch
  • Climasense fabric
  • Mesh ventilation panels

List: $25.00 $6.05 (24%)

Starting at: $18.95
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Ibex Woolies 1 Crew for Women

SKU: IBXW1W

  • Breathable
  • Anti-odor
  • Raglan sleeves
  • Flatlock seams

Regular: $80.00 $30.05 (38%)

Your Price: $49.95
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The North Face Light Longsleeve Zip Neck for Women

SKU: NFCLLZWXSBK

  • Material: polyester, polyolefin
  • Half-length zipper
  • Flat-locked seams
  • FlashDry microparticles
  • Weight: 3.7 oz.

Regular: $50.00 $25.05 (50%)

Your Price: $24.95

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Sale

Ibex Woolies 1 Henley for Women

SKU: IBX1HW

  • Breathable
  • Anti-odor
  • Set-in sleeves
  • Flatlock seams

Regular: $85.00 $30.05 (35%)

Your Price: $54.95
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Ibex Woolies 2 Zip T-Neck for Men

SKU: IBX2ZM

  • Breathable
  • Anti-odor
  • Set-in sleeves
  • Flatlock seams

Regular: $80.95 $6.00 (7%)

Starting at: $74.95
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Mammut Go Warm Longsleeve Zip Baselayer for Men

SKU: MMTGWZM

  • Contoured cut
  • Extended back
  • Zip with zip-store
  • 100% polyester microfiber
  • Merino wool and polyester mix

Regular: $54.95 $10.00 (18%)

Starting at: $44.95
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Ibex Woolies 1 Zip T-Neck for Men

SKU: IBX1ZM

  • Breathable
  • Anti-odor
  • Set-in sleeves
  • Zippered neck

Your Price: $85.00
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SmartWool NTS Midweight 250 Zip T for Women

SKU: SMTZTW

  • Standalone or under-layer
  • 8 inch center front zip
  • Back seam wraps to front
  • Breathable, odor resistant

Your Price: $99.99
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SmartWool PhD Light Zip T for Men

SKU: SMTLZM

  • PhD performance
  • Breathable, quick drying
  • Body mapped mesh panels
  • Merrow seam construction

Your Price: $95.00
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Mammut Go Warm Longsleeve Zip Baselayer for Women

SKU: MMTGWZW

  • Contoured cut
  • The extended back 
  • Zip with zip-store 
  • 100% polyester microfiber 
  • Merino wool and polyester mix 

Regular: $85.00 $40.05 (47%)

Starting at: $44.95
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Icebreaker Oasis Long Sleeve Lightweight Crewe for Women

SKU: ICBOLLCW

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

Your Price: $89.99
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Minus33 Merino Wool Mid Weight 1/4 Length Zip for Women

SKU: MINMWQZW

  • 100% 18.5 Micron Merino Wool
  • 230 g/m2 interlock knit construction
  • Flat lock seams

List: $75.99 $11.00 (14%)

Your Price: $64.99
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ColdPruf Performance 58 Crew for Women

SKU: CLDPRCW

  • Single layer engineering
  • Max dryness, antimicrobial
  • Moisture management
  • Polyester, spandex

Regular: $18.99 $2.00 (11%)

Starting at: $16.99
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List: $45.00 $16.05 (36%)

Your Price: $28.95
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SmartWool NTS Microweight 150 Crew Top for Men

SKU: SMTMCMN

  • Merino Wool
  • Stripe Tape Binding
  • Flatlock Seam Construction
  • Jersey Knit

List: $75.00 $19.05 (25%)

Your Price: $55.95
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