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

Polarmax Core-4 Tech Fleece Crew for Men

5.0
(1 review)
Ratings Distribution
  • 5 Stars
     
    (1)
  • 4 Stars
     
    (0)
  • 3 Stars
     
    (0)
  • 2 Stars
     
    (0)
  • 1 Stars
     
    (0)

SKU: PMXC4TCM

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

Your Price: $43.95
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Sale

Polarmax Core-4 Tech Fleece Zip Mock for Women

SKU: PMXC4TMW

  • 4-way power stretch fabric
  • Tech face
  • Brushed fleece interior
  • No shrink
  • Athletic Fit

Regular: $53.95 $20.00 (37%)

Starting at: $33.95
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Sale

Polarmax Montana Wool 2.0 Crew Mens

SKU: PMXMWC2M

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Regular: $69.95 $13.00 (19%)

Starting at: $56.95
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Polarmax Quattro Fleece Zip Mock Mens

SKU: PMXQFZM

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $49.94
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Polarmax Maxride Crew for Men

SKU: PMXMRCM

  • Layering piece or wear alone
  • Contrast stitch
  • Machine wash & dry, no shrinking
  • Lightweight rib knit 
  • Anti-microbial and scent prevent

Your Price: $20.95
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Polarmax Double Base Layer Crew for Women

4.0
(2 reviews)
Ratings Distribution
  • 5 Stars
     
    (0)
  • 4 Stars
     
    (2)
  • 3 Stars
     
    (0)
  • 2 Stars
     
    (0)
  • 1 Stars
     
    (0)

SKU: PMXDBLCW

  • Stretches
  • Quick Drying
  • Scent Prevent Anti-Microbial
  • Relaxed Fit Flat Seams
  • Feels like cotton

Your Price: $20.95
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Polarmax Montana Wool 2.0 Crew Womens

SKU: PMXMWC2W

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $69.95
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Polarmax Quattro Fleece Zip Mock Womens

SKU: PMXQFZW

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $49.94
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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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Polarmax Core 3.0 LongSleeve Crew Womens

SKU: PMXC3LCW

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $44.95
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In Stock + Wish list

Polarmax Maxride Crew for Women

SKU: PMXMRCW

  • Layering piece, or wear it alone
  • Contrast stitch
  • Machine wash & dry, no shrinking
  • Lightweight rib knit
  • Anti-microbial to prevent any scent

Your Price: $20.95
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Polarmax Montana Wool 2.0 Zip Mock Womens

SKU: PMXMWZ2W

  • Mid-weight
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $74.95
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Polarmax Micro H2 Base Layer V-Neck for Women

SKU: PMXMHVW

  • Base layer
  • Polyester fabric
  • Stretch ability
  • Machine washable
  • Contrast Stitching

Regular: $39.95 $20.00 (50%)

Your Price: $19.95
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Polarmax Montana Wool Mens Crew

SKU: PMXMWCM

  • Lightweight
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $59.95
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Polarmax 4-Way Stretch Zip Mock for Women

SKU: PMXSSZMW

  • 4-Way stretch XG fabric
  • Quick drying
  • Scent prevent anti-microbial
  • Comfortable flat seams
  • Athletic fit

Your Price: $41.95
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Sale

Polarmax Powerskins By XGO Long Sleeve Crew Shirt for Men

SKU: PMXPSLCM

  • Anti microbial
  • Won't shrink, pick, fade
  • Durable, breathable
  • Four way stretch

Regular: $27.95 $1.00 (4%)

Your Price: $26.95
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Polarmax Core 4.0 LongSleeve Crew Mens

SKU: PMXC4CLM

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $49.95
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Sale

Polarmax Micro H2 Base Layer Zip Mock for Men

SKU: PMXMHZM

  • Acclimate dry polyester
  • Weight 0.5 lb.
  • Ventilating zip neck
  • Plaited construction

Regular: $32.95 $8.00 (24%)

Your Price: $24.95
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Polarmax Double Base Layer Crew for Men

SKU: PMXDBLCM

  • Stretches
  • Wicks
  • Quick drying
  • Breathes
  • Scent prevent anti-microbial

Your Price: $20.95
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In Stock + Wish list

Polarmax Core 3.0 LongSleeve Crew Mens

SKU: PMXC3LCM

  • Stretchy
  • Moisture wicking
  • Breathable, quick drying
  • Anti-microbial

Your Price: $44.95
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In Stock + Wish list