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.

Minus33 Merino Wool Lightweight Crew for Men

SKU: MINLCM

  • 100% 17.5-Micron-Merino wool 
  • 170 g/m2 Jersey-knit construction
  • Flat-lock seams
  • Machine-washable
  • Sizes available: X-small to XXX-large

List: $59.99 $9.00 (15%)

Your Price: $50.99
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List: $65.99 $9.50 (14%)

Your Price: $56.49
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Mammut Long Pants Warm-Quality Thermal Underwear for Men

SKU: MMTLPWQM

  • Fast drying
  • Antimicrobial feature
  • Material: 83% Polyester, 17% Wool
  • Body zone fabric design

Regular: $80.00 $45.05 (56%)

Your Price: $34.95
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Minus33 Merino Wool Lightweight Crew Neck for Women

SKU: MINLCW

  • Jersey knit construction
  • 100% Merino Wool
  • Lightweight base layer
  • Flat lock seams
  • Machine dry

List: $59.99 $9.00 (15%)

Your Price: $50.99
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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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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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Minus33 Merino Wool Mid Weight Crew Neck for Men

SKU: MINMWCM

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

List: $65.99 $9.50 (14%)

Your Price: $56.49
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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 Warm Longsleeve Shirt Baselayer for Men

SKU: MMTGWSM

  • Extended back
  • Contoured cut
  • Body Mapping technology
  • Polyester microfiber 
  • Antimicrobial feature

Regular: $75.00 $30.05 (40%)

Your Price: $44.95
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Regular: $56.49 $19.50 (35%)

Starting at: $36.99
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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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Mammut Go Dry Longsleeve Baselayer Shirt for Women

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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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Minus33 Merino Wool Lightweight Bottoms for Men

SKU: MINLBM

  • 100% Merino Wool
  • Jersey knit construction
  • Lightweight base layer
  • Flat lock seams
  • Machine washable 

List: $59.99 $9.00 (15%)

Your Price: $50.99
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Regular: $60.00 $25.05 (42%)

Your Price: $34.95
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Sale

Regular: $60.00 $25.05 (42%)

Your Price: $34.95
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Top Rated Gear

List: $75.99 $11.00 (14%)

Your Price: $64.99
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Minus33 Allagash Lightweight 1/4 Length Zip for Men

SKU: MINLZM

  • Merino wool
  • Jersey knit construction
  • Flat lock seams
  • Machine washable

List: $64.99 $9.50 (15%)

Your Price: $55.49
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