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

Under Armour UA Essential Solid Compression Shorts Men

SKU: UNAESCSM

  • Hydro armour technology
  • ISO chill cooling technology
  • Quick dry waistband
  • Armour block

Regular: $39.99 $15.04 (38%)

Your Price: $24.95
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Sale

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: $45.00 $20.05 (45%)

Starting at: $24.95
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Sale

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%)

Starting at: $27.95
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Sale

Terramar Women's Thermawool 100% Merino Wool Pants

3.0
(3 reviews)
Ratings Distribution
  • 5 Stars
     
    (0)
  • 4 Stars
     
    (2)
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SKU: TRMWTWP

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

Regular: $35.95 $7.00 (19%)

Your Price: $28.95
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Top Rated Gear

Terramar Men's Thermolator II Pants

5.0
(1 review)
Ratings Distribution
  • 5 Stars
     
    (1)
  • 4 Stars
     
    (0)
  • 3 Stars
     
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SKU: TRMMT2P

  • 86% Micro-Polyester and 14% Spandex
  • ec2 Qwik-Dri Thermoregulation Comfort Technology
  • Two Fabric Jersey and Mesh Construction
  • Anti-microbial
  • Fabric Weight: 180 grams (5.36 oz.)

Your Price: $24.95
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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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Sale

Mammut Go Warm Baselayer Pants for Women

3.0
(1 review)
Ratings Distribution
  • 5 Stars
     
    (0)
  • 4 Stars
     
    (0)
  • 3 Stars
     
    (1)
  • 2 Stars
     
    (0)
  • 1 Stars
     
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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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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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Sale

Adidas Ultimate 3/4 Tight for Women

SKU: ADSUT34T

  • Wide elastic waistband
  • Climalite fabric
  • Fitted fit
  • Adidas logo on hip

Regular: $38.00 $13.05 (34%)

Starting at: $24.95
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Sale

Regular: $34.95 $5.00 (14%)

Starting at: $29.95
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Sale

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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Polarmax Double Base Layer Pants for Men

SKU: PMXDBLPM

  • Stretches
  • Wicks
  • Quick drying
  • Breathes
  • Scent prevent antimicrobial

Your Price: $25.95
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Sale

Marmot ThermalClime Sport SS Crew for Women

SKU: MRMTSSCW

  • Quick drying
  • Moisture wicking
  • Water resistant elastane
  • Flat lock seams

Regular: $35.00 $12.05 (34%)

Your Price: $22.95
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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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Terramar Cloud Nine CS Half-Zip 2.0 for Women

SKU: TRMCNH2W

  • Stretch jersey
  • Moisture wicking
  • Fast drying
  • Breathable

Your Price: $28.95
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Sale

Mammut Go Warm Baselayer 3/4 Pants for Women

SKU: MMTGW3PW

  • Contoured cut
  • 100% polyester microfiber
  • Antimicrobial feature
  • Merino wool and polyester blend

Regular: $49.00 $19.05 (39%)

Starting at: $29.95
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Terramar Men's Thermolator II Half-Zip with Mesh Shirt

SKU: TRMMT2H

  • 86% Micro-Polyester and 14% Spandex
  • Qwik-Dri Thermoregulation Comfort Technology
  • Two Fabric Jersey and Mesh Construction
  • Ergonomic Zipper Pull
  • Anti-microbial

List: $31.95 $4.00 (13%)

Starting at: $27.95
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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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Sale

Coldpruf Extreme Performance Crew for Men

SKU: CLDEPCM

  • CPT Fiber Technology
  • Two-Layer Engineering
  • Traps Air Between Layers
  • 96% CPT Performance Polyester
  •  4% Spandex

Regular: $30.99 $3.00 (10%)

Starting at: $27.99
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