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

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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Top Rated Gear

List: $95.99 $14.00 (15%)

Your Price: $81.99
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Sale

Regular: $38.95 $4.00 (10%)

Starting at: $34.95
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Sale

Marmot ThermalClime Sport LS Crew Shirt for Men

SKU: MRMTLSCM

  • Quick drying
  • Moisture wicking
  • Stretch elastane
  • Flat lock seams

Regular: $42.00 $17.05 (41%)

Starting at: $24.95
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Minus33 Kenai Women's Expedition Weight Bottoms

SKU: MINEBW

  • Merino wool
  • Interlock construction
  • Flat lock seams
  • Machine washable

List: $95.99 $14.00 (15%)

Your Price: $81.99
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Sale

Mammut Go Warm Baselayer Pants for Women

3.0
(1 review)
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SKU: MMTGWPW

  • Contoured cut
  • Merino wool and polyester microfiber
  • Antimicrobial feature
  • Body Mapping technology

Regular: $60.00 $30.05 (50%)

Starting at: $29.95
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SmartWool Midweight Bottom for Women

SKU: SMTMBW

  • Fabric Covered Elastic Waistband
  • 100% Merino Wool
  • Form Fit - Natural Rise
  • Interlock Knit
  • UPF 50+

Your Price: $69.95
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Minus33 Merino Wool Midweight Bottoms for Girls

SKU: MINMBG

  • 100 percent merino wool
  • Moisture wicking
  • Odor repellent
  • UPF 50

List: $45.99 $6.50 (14%)

Your Price: $39.49
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Marmot ThermalClime Sport LS Crew for Women

SKU: MRMTLSCW

  • Polartec power dry
  • Upcycle product
  • Quick drying, moisture wicking
  • Stretch elastane

Your Price: $42.00
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Minus33 Yukon Men's Expedition Weight Crew

SKU: MINECM

  • Merino wool
  • Interlock construction
  • Flat lock seams
  • Machine washable

List: $95.99 $14.00 (15%)

Your Price: $81.99
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Sale

Regular: $39.00 $14.05 (36%)

Your Price: $24.95
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Sale

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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Ibex Woolies 2 Crew for Men

SKU: IBX2CM

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

List: $100.00 $36.05 (36%)

Your Price: $63.95
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Minus33 Merino Wool MidWeight Bottoms - Men's

Mossy Oak Infinity

SKU: MINMBMMO

  • Merino wool
  • Interlock knit construction
  • Flat lock seams
  • Machine wash, dry

List: $80.99 $12.00 (15%)

Your Price: $68.99
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Polar Max Performance Tech Silk Crew for Men

SKU: PMXPSCM

  • Lightweight mesh
  • Anti microbial
  • Wicks moisture
  • Stretchable, flexible

Your Price: $22.95
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Minus33 Tanana Women's Expedition Weight Crew

SKU: MINECW

  • Merino wool
  • Interlock construction
  • Flat lock seams
  • Machine washable

List: $95.99 $14.00 (15%)

Your Price: $81.99
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Mammut Go Dry Boxer for Men

SKU: MMTGDBM

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

List: $35.00 $10.05 (29%)

Your Price: $24.95
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Sale

Regular: $60.00 $25.05 (42%)

Your Price: $34.95
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Sale

Arc'teryx RHO LT Zip Neck for Women

SKU: ARCLZNW

  • Moisture-wicking
  • Warm when wet
  • Resists odors
  • Flatlock seams

Regular: $119.00 $39.05 (33%)

Starting at: $79.95
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