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.

SmartWool NTS Microweight 150 Pattern Crew Top for Men

SKU: SMTMWPCM

  • Jersey Knit Construction
  • Flatlock Seam Design
  • Form Fit
  • Stripe Tape Binding

List: $80.00 $20.05 (25%)

Your Price: $59.95
Select Options

In Stock + Wish list

Sale

Regular: $55.00 $25.05 (46%)

Your Price: $29.95
Select Options

In Stock + Wish list

Sale

SmartWool Midweight Pattern Crew Top for Men

SKU: SMTMPCM

  • 100% Merino Wool
  • Form Fitted
  • Interlock Knit 
  • Shoulder Panels
  • Flatlock Seams

Regular: $90.99 $25.00 (27%)

Your Price: $65.99
Select Options

In Stock + Wish list

Sale

SmartWool Midweight 250 Bottom for Kids

SKU: SMTKB

  • Form fitting
  • Interlock knit
  • Elastic waistband
  • Flatlock seam construction

Regular: $49.99 $15.00 (30%)

Starting at: $34.99
Select Options

In Stock + Wish list

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
     
    (0)

SKU: MMTGWPW

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

Regular: $54.00 $24.05 (45%)

Your Price: $29.95
Select Options

In Stock + Wish list

SmartWool Midweight Crew Top for Women

SKU: SMTMDCW

  • Upf 50+ protection
  • Back Body Seam Wraps
  • Shoulder Panels
  • Flatlock Seam Construction 
  • Heat Transfer Logo

List: $95.00 $25.01 (26%)

Your Price: $69.99
Select Options

In Stock + Wish list

SmartWool NTS Micro 150 Bottom for Women

SKU: SMTBTW

  • Lightweight base layer
  • Form fitting Jersey knit
  • Flatlock seams
  • Elastic waistband

List: $74.95 $17.96 (24%)

Your Price: $56.99
Select Options

In Stock + Wish list

SmartWool Midweight Zip T for Women

SKU: SMTMZTW

  • 100% Merino Wool
  • Form fit
  • 12 in. center front zip
  • Back Body Seam
  • Flatlock seam construction eliminates chafing

List: $100.00 $25.05 (25%)

Your Price: $74.95
Select Options

In Stock + Wish list

Sale

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
Select Options

In Stock + Wish list

SmartWool Midweight Bottom for Men

SKU: SMTMBM

  • Form Fit 
  • UPF 50+
  • Traditional fly design
  • Flatlock seam construction 
  • Two color choices

List: $95.00 $25.01 (26%)

Your Price: $69.99
Select Options

In Stock + Wish list

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%)

Your Price: $29.95
Select Options

In Stock + Wish list

List: $85.00 $22.05 (26%)

Your Price: $62.95
Select Options

In Stock + Wish list

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
Select Options

In Stock + Wish list

Sale

Mammut Go Dry Baselayer Pants for Women

SKU: MMTGDPW

  • Stretch material with waffle backing
  • Contoured cut
  • Allows freedom of movement
  • Fast drying
  • Antimicrobial feature to avoid unpleasant odor

Regular: $49.00 $19.05 (39%)

Starting at: $29.95
Select Options

In Stock + Wish list

Sale

SmartWool Kids Crew

SKU: SMTKC

  • Form fitting
  • Interlock knit
  • UPF 50+
  • Crew neck

Regular: $49.99 $15.00 (30%)

Starting at: $34.99
Select Options

In Stock + Wish list

SmartWool Midweight Bottom for Women

SKU: SMTMBW

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

List: $94.95 $26.00 (27%)

Starting at: $68.95
Select Options

In Stock + Wish list

Sale

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
Select Options

In Stock + Wish list