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 Women's Thermawool 100% Merino Wool Pants

3.0 (3 reviews)
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SKU: TRMWTWP

  • 100% Mercerized Super Soft Merino Wool Jersey
  • Machine-Washable
  • Itch-free
  • Breathable
  • Flatlock Seam Construction

Your Price: $35.95
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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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Terramar Cloud Nine CS Scoop 2.0 Shirt for Women

SKU: TRMCNS2W

  • Stretch jersey
  • Moisture wicking
  • Fast drying
  • Breathable

Your Price: $17.95
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Terramar Cloud Nine CS Tight 2.0 for Women

SKU: TRMCNT2W

  • Thermolator II fabric
  • EC2 Qwik-Dri technology
  • Anti microbial
  • UPF 25 sun protection

Your Price: $17.95
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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

Your Price: $15.95
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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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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: $77.00 $32.05 (42%)

Your Price: $44.95
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Top Rated Gear

Your Price: $42.95
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Terramar Ecolator CS Fleece Scoop 3.0 for Women

SKU: TRMECS3W

  • Comfort in all seasons
  • Antimicrobial
  • Heavyweight
  • Breathable

Your Price: $25.95
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Mammut 3/4 Pants Warm-Quality Thermal Underwear for Men

SKU: MMT3PWQM

  • Top high-end functionality
  • Youthful design
  • Fast drying
  • Antimicrobial
  • Specially developed fabrics 

Regular: $70.00 $38.05 (54%)

Your Price: $31.95
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Terramar Women's Pointelle Silk Pant

SKU: TRMWSP

  • Material: 100% Filament Pointelle knit silk
  • Covered elastic waist
  • Rib cuffs with spandex
  • Qwik-Dri thermoregulation technology 
  • Antimicrobial fabric

List: $27.95 $8.00 (29%)

Starting at: $19.95
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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: $77.00 $32.05 (42%)

Your Price: $44.95
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Mammut Go Dry Shortsleeve Baselayer T-Shirt for Women

SKU: MMTGDSSW

  • Light, stretch material with waffle backing
  • Contoured cut
  • Quick drying
  • Antimicrobial feature
  • Ultraviolet Protection Factor (UPF) 20+

Regular: $39.00 $16.05 (41%)

Starting at: $22.95
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Mammut Go Dry Baselayer Pants for Women

SKU: MMTGDPW

  • Stretch material with waffle backing
  • Contoured cut
  • Allows freedom of movement
  • Fast drying
  • Antimicrobial feature to avoid unpleasant odor

Regular: $49.00 $19.05 (39%)

Starting at: $29.95
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Mammut Go Dry Longsleeve Baselayer Shirt for Women

5.0 (1 review)
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SKU: MMTGDLSW

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

Regular: $49.00 $19.05 (39%)

Starting at: $29.95
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Mammut Go Dry Boxer for Men

SKU: MMTGDBM

  • Contoured cut
  • Freedom of movement
  • Youthful design
  • Fast drying
  • Antimicrobial

Regular: $29.00 $12.05 (42%)

Starting at: $16.95
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Terramar Kashmir HG V-Neck 1.0 for Women

SKU: TRMKHV1W

  • HG Climasense heat generating technology
  • Soft, breathable, and fast-drying
  • Antimicrobial finish
  • Brushed surface
  • UPF rating 25+

Your Price: $16.95
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Terramar Men's Helix Short-Sleeve Polyester Crew T-Shirt

5.0 (1 review)
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  • 4 Stars
     
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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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