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.

Polar Max Performance Tech Silk Crew for Men

SKU: PMXPSCM

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

Your Price: $21.95
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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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Regular: $27.95 $11.00 (39%)

Starting at: $16.95
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ColdPruf Classic 170 Silk Weight Merino Wool Crew for Women

SKU: CLDCCW

  • Single layer jersey knit
  • Silk weight
  • Merino wool
  • Tagless, flat seams

Regular: $45.99 $5.00 (11%)

Starting at: $40.99
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SmartWool Midweight Pattern Crew Top for Women

SKU: SMTMPCW

  • 100% Merino Wool
  • Form Fitting 
  • Jacquard Knit 
  • Back Body Seam
  • Shoulder Panels

List: $105.00 $27.01 (26%)

Your Price: $77.99
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Patagonia Versatiliti Top for Women

SKU: PTGVTW

  • Plaited organic cotton and Tencel lyocell
  • Fabric is soft and comfortable
  • Short-sleeve, V-neck styling
  • Fine gathers at front yoke
  • Very versatile

Regular: $45.00 $26.05 (58%)

Your Price: $18.95
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Regular: $56.49 $19.50 (35%)

Starting at: $36.99
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ColdPruf Basic 90 Crew for Men

SKU: CLDBCM

  • Two layer engineering
  • Natural warmth barrier
  • Tagless
  • Flat seams

Regular: $11.99 $1.00 (8%)

Starting at: $10.99
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SmartWool NTS Micro 150 Pattern Crew for Women

SKU: SMTMPW

  • Form fitting Jersey knit
  • Stretch stitching
  • Side seams wrap to front
  • Tagless comfort

List: $79.95 $19.96 (25%)

Starting at: $59.99
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Marmot Windridge Short Sleeve Shirt for Men

SKU: MRMWSSM

  • Ultraviolet protection factor (UPF) 50
  • Knit, polyester fabric
  • Tag-free neckline
  • Flat-locked seams
  • Mesh panels

Regular: $30.00 $10.05 (34%)

Starting at: $19.95
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ColdPruf Authentic Wool Plus 92 Crew for Men

SKU: CLDAWCM

  • Ring spun cotton, Merino wool, nylon
  • Combed, ring spun cotton
  • Inner layer body heat
  • Rib knit cuffs

Regular: $22.99 $2.00 (9%)

Starting at: $20.99
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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.)

Your Price: $27.95
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Mountain Hardwear Wicked Lite T-Shirt Short Sleeve for Women

SKU: MHWWLSWN

  • Wicking, fast drying fabric
  • Antimicrobial finish controls odor
  • Flat-lock seam construction eliminates chafe
  • Reflective trim for visibility
  • MHW classic wicking tee

Regular: $35.00 $19.05 (54%)

Your Price: $15.95
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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: $34.95
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Mammut Go Warm T-Shirt Baselayer for Women

SKU: MMTGWTW

  • Contoured cut
  • Extended back
  • 100% polyester microfiber
  • Merino wool and polyester mix
  • Antimicrobial feature

Regular: $60.00 $32.05 (53%)

Your Price: $27.95
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SmartWool NTS Microweight 150 Pattern Crew Top for Women

SKU: SMTMWPCW

  • Soft, Non-Irritating Material
  • Shaped Bottom Hem
  • Lightweight
  • UPF Rating Of 30

Regular: $69.99 $25.00 (36%)

Your Price: $44.99
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Columbia Base Layer Midweight Long Sleeve for Men

SKU: COLBMLTM

  • Omni-Wick inserts
  • Omni-Heat thermal reflective lining
  • Antimicrobial treatment
  • Four-way stretch and ergonomic seaming
  • Material: polyester and elastane

Regular: $55.00 $27.05 (49%)

Your Price: $27.95
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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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Regular: $11.99 $2.00 (17%)

Starting at: $9.99
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