Merino Wool Base Layer Clothing

Discover the ultimate comfort and performance with our merino wool base layer clothing collection. Designed to regulate temperature and wick moisture, these lightweight layers provide exceptional warmth without bulk. Perfect for outdoor adventures or everyday wear, merino wool offers natural breathability and odor resistance, keeping you fresh all day long. With a range of styles and fits, our base layers ensure a snug, comfortable fit that moves with you. Elevate your layering game and experience the benefits of merino wool for any activity.

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137 products
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SmartWool Merino 150 Base Layer Long Sleeve Shirt
  • Black

SmartWool Merino 150 Base Layer Long Sleeve Shirt

$90.00

SmartWool Women's Merino 150 Base Layer Bottoms
  • Black

SmartWool Women's Merino 150 Base Layer Bottoms

$90.00

On Sale
Smartwool Men's Classic Thermal Merino Base Layer Bottoms
  • Deep Navy
  • Charcoal Heather
  • Black

Smartwool Men's Classic Thermal Merino Base Layer Bottoms

$85.97-$115.00

WAS: $115.00*

Smartwool Men's Merino Classic All-Season Base Layer Long Sleeve
  • Black

Smartwool Men's Merino Classic All-Season Base Layer Long Sleeve

See Price in Cart

WAS: $90.00*

On Sale
Smartwool Men's Classic Thermal Merino Base Layer Crew Top
  • Winter Moss Heather
  • Black
  • Black Color Shift

Smartwool Men's Classic Thermal Merino Base Layer Crew Top

$85.97-$115.00

WAS: $115.00*

SmartWool Men's Classic Thermal Merino 1/4 Zip Base Layer
  • Charcoal/Honey Gold

SmartWool Men's Classic Thermal Merino 1/4 Zip Base Layer

$145.00

On Sale
Smartwool Men's Intraknit Thermal Merino Base Layer Bottom
  • Black White

Smartwool Men's Intraknit Thermal Merino Base Layer Bottom

$97.97

WAS: $130.00*

Smartwool Kids' Classic Thermal Merino Base Layer Crew
  • Power Pink

Smartwool Kids' Classic Thermal Merino Base Layer Crew

$64.95

Smartwool Kids' Classic Thermal Merino Base Layer Bottom
  • Cascade Multi Stripe

Smartwool Kids' Classic Thermal Merino Base Layer Bottom

$64.95

On Sale
Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Top
  • Iron Heather
  • Black

Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Top

$63.97-$85.00

WAS: $85.00*

Smartwool Men's Intraknit Thermal Merino Base Layer Crew Neck Long Sleeved T-Shirt
  • Charcoal Black
  • Winter Moss
  • Black/White

Smartwool Men's Intraknit Thermal Merino Base Layer Crew Neck Long Sleeved T-Shirt

$130.00

SmartWool Youth Classic Thermal ¼ Zip Base Layer
  • Rhythmic Red

SmartWool Youth Classic Thermal ¼ Zip Base Layer

$65.00

On Sale
Smartwool Men's Intraknit Thermal Max Merino Base Layer Three-Quarter Bottom
  • Black White

Smartwool Men's Intraknit Thermal Max Merino Base Layer Three-Quarter Bottom

See Price in Cart

WAS: $120.00*

On Sale
Smartwool Women's Merino 250 Pattern Baselayer Bottom
  • Blueberry Hill Mtn Scape

Smartwool Women's Merino 250 Pattern Baselayer Bottom

$82.97

WAS: $110.00*

SmartWool Women's Intraknit Active Base Layer Bottoms
  • Black

SmartWool Women's Intraknit Active Base Layer Bottoms

$110.00

SmartWool Women's Intraknit Active Base Layer Long Sleeve Shirt
  • Black

SmartWool Women's Intraknit Active Base Layer Long Sleeve Shirt

$110.00

On Sale
Smartwool Men's Merino 250 Baselayer Crewneck Shirt

Smartwool Men's Merino 250 Baselayer Crewneck Shirt

See Price in Cart

WAS: $115.00*

Smartwool Women's Classic Thermal Merino Baselayer Bottoms

Smartwool Women's Classic Thermal Merino Baselayer Bottoms

See Price in Cart

WAS: $115.00*

On Sale
Smartwool Men's Merino 250 Baselayer Bottom
  • Charcoal Heather
  • Black
  • Deep Navy

Smartwool Men's Merino 250 Baselayer Bottom

$85.97-$115.00

WAS: $115.00*

On Sale
Smartwool Women's Classic Thermal Merino Baselayer Long Sleeve Shirt

Smartwool Women's Classic Thermal Merino Baselayer Long Sleeve Shirt

$85.97-$115.00

WAS: $115.00*

Smartwool Women's Intraknit Thermal Merino Crew Baselayer Top
  • Black White Stripe
  • Black/White
  • Nightfall Blue/Deep Navy

Smartwool Women's Intraknit Thermal Merino Crew Baselayer Top

$130.00

Smartwool Men's Classic All-Season Merino Base Layer 1/4 Zip Long Sleeve Top
  • Black

Smartwool Men's Classic All-Season Merino Base Layer 1/4 Zip Long Sleeve Top

$90.00

On Sale
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew Neck T-Shirt
  • Deep Navy/Twilight Blue
  • Charcoal/Winter Moss
  • Winter Moss/Charcoal

Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew Neck T-Shirt

$96.97-$130.00

WAS: $130.00*

On Sale
Smartwool Women's Merino 250 Baselayer Top

Smartwool Women's Merino 250 Baselayer Top

See Price in Cart

WAS: $115.00*

On Sale
Smartwool Men's Classic All-Season Merino Baselayer Bottoms
  • Iron Heather
  • Black

Smartwool Men's Classic All-Season Merino Baselayer Bottoms

$63.97-$85.00

WAS: $85.00*

On Sale
Smartwool Women's Merino 250 Pattern Crewneck Baselayer Top
  • Honey Gold Dot
  • Festive Fuschia Mtnscape
  • Light Gray Mountain Scape

Smartwool Women's Merino 250 Pattern Crewneck Baselayer Top

$82.97-$110.00

WAS: $110.00*

On Sale
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Quarter-Zip Shirt
  • Shale Dune

Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Quarter-Zip Shirt

$100.97

WAS: $135.00*

On Sale
Smartwool Men's Classic Thermal Merino Base Layer Pattern Quarter Zip Pullover
  • Charcoal Heather
  • Deep Navy Color Shift

Smartwool Men's Classic Thermal Merino Base Layer Pattern Quarter Zip Pullover

$89.97-$120.00

WAS: $120.00*

Smartwool Women's Merino 250 Pattern 1/4 Zip Baselayer Shirt
  • Jade Marble

Smartwool Women's Merino 250 Pattern 1/4 Zip Baselayer Shirt

$115.00

On Sale
Smartwool Men's Merino 250 1/4 Zip Baselayer Top

Smartwool Men's Merino 250 1/4 Zip Baselayer Top

$89.97-$120.00

WAS: $120.00*

On Sale
Hot Chillys Men's Clima-Wool Merino Bottom
  • Nightfall
  • Od Green

Hot Chillys Men's Clima-Wool Merino Bottom

See Price in Cart

WAS: $125.00*

Smartwool Women's Merino 250 1/4 Zip Baselayer Top
  • Black

Smartwool Women's Merino 250 1/4 Zip Baselayer Top

$120.00

On Sale
Smartwool Women's Intraknit Thermal Merino Pattern Baselayer Top
  • Black
  • Deep Navy

Smartwool Women's Intraknit Thermal Merino Pattern Baselayer Top

$96.97-$130.00

WAS: $130.00*

Smartwool Women's Thermal Merino Rib Top
  • Black
  • Toasted Coconut Heather
  • Chalk Violet Heather

Smartwool Women's Thermal Merino Rib Top

$130.00

Smartwool Youth Merino 250 Pattern Crewneck Baselayer Top
  • Sunset Coral Mountain

Smartwool Youth Merino 250 Pattern Crewneck Baselayer Top

$60.00

On Sale
Hot Chillys Women's Clima-Wool Merino Bottom
  • Nightfall

Hot Chillys Women's Clima-Wool Merino Bottom

See Price in Cart

WAS: $125.00*

Smartwool Youth Merino 250 Baselayer Bottom
  • Power Pink

Smartwool Youth Merino 250 Baselayer Bottom

$49.97-$60.00

WAS: $60.00*

Smartwool Merino 150 Baselayer Pants
  • Black

Smartwool Merino 150 Baselayer Pants

$90.00

Smartwool Men's Intraknit Merino 200 Pattern Crewneck Baselayer Top
  • Honey Gold Mountain

Smartwool Men's Intraknit Merino 200 Pattern Crewneck Baselayer Top

$130.00

On Sale
Smartwool Women's Merino 250 Baselayer Leggings

Smartwool Women's Merino 250 Baselayer Leggings

$85.97-$115.00

WAS: $115.00*

Smartwool Women's Thermal Merino Crew
  • Charcoal Heather
  • Toasted Coconut Heather
  • Arctic Green Heather

Smartwool Women's Thermal Merino Crew

$120.00

On Sale
Smartwool Women's Intraknit Thermal Merino Baselayer Leggings
  • Black/White

Smartwool Women's Intraknit Thermal Merino Baselayer Leggings

$97.97

WAS: $130.00*

On Sale
Smartwool Women's Intraknit Thermal Base Layer 3/4 Leggings
  • Black White

Smartwool Women's Intraknit Thermal Base Layer 3/4 Leggings

$89.97

WAS: $120.00*

On Sale
Smartwool Women's Thermal Merino Pattern Crewneck Long Sleeve Shirt
  • Light Gray Mtn Fairisle
  • Festive Fuschia Mtnscape

Smartwool Women's Thermal Merino Pattern Crewneck Long Sleeve Shirt

$81.97

WAS: $110.00*

On Sale
Smartwool Thermal Merino Pattern Crew
  • Black Mountain Print
  • Laguna

Smartwool Thermal Merino Pattern Crew

$81.97

WAS: $110.00*

Smartwool Women's Merino Tank
  • Twilight Blue

Smartwool Women's Merino Tank

$69.95

Smartwool Women's Merino Sport 120 Short Sleeve T-Shirt
  • Twilight Blue

Smartwool Women's Merino Sport 120 Short Sleeve T-Shirt

$60.00

On Sale
Outdoor Research Alpine Onset Merino 240 Sensor Liner
  • Black
  • Light Pewter

Outdoor Research Alpine Onset Merino 240 Sensor Liner

$33.97-$45.00

WAS: $45.00*

Smartwool Men's Merino SS Tee

Smartwool Men's Merino SS Tee

$80.00

Smartwool Women's Thermal Merino Turtleneck Ribbed Sweater
  • Charcoal Heather
  • Arctic Green Heather
  • Chalk Violet Heather

Smartwool Women's Thermal Merino Turtleneck Ribbed Sweater

$120.00

On Sale
Smartwool Women's Merino SS Tee

Smartwool Women's Merino SS Tee

$79.95

WAS: $80.00*

icebreaker Men's Merino 125 Cool-Lite Sphere III Long-Sleeve Shirt
  • Metro Heather
  • Black
  • Dawn Heather

icebreaker Men's Merino 125 Cool-Lite Sphere III Long-Sleeve Shirt

$85.00

icebreaker Men's Merino Blend 200 Realfleece Descender 1/2 Zip Long Sleeve Top
  • Fathom Green/Cloud Ray/Cb
  • Black/Graphite/Cb

icebreaker Men's Merino Blend 200 Realfleece Descender 1/2 Zip Long Sleeve Top

$160.00

icebreaker Women's Merino Blend 200 Realfleece Descender 1/2 Zip Long Sleeve Top
  • Graphite/Black/Cb

icebreaker Women's Merino Blend 200 Realfleece Descender 1/2 Zip Long Sleeve Top

$160.00

Halfdays Women's Fay Merino Baselayer Top
  • Spiked Cocoa
  • Black
  • Navy

Halfdays Women's Fay Merino Baselayer Top

$95.00-$130.00

icebreaker Women's Merino 260 Quantum IV Long Sleeve Zip Hoodie
  • Lichen
  • Dawn
  • Black

icebreaker Women's Merino 260 Quantum IV Long Sleeve Zip Hoodie

$240.00

Adidas Men's Terrex Xperior Merino 150 Baselayer Long-Sleeve Top
  • Grey Five

Adidas Men's Terrex Xperior Merino 150 Baselayer Long-Sleeve Top

$100.00

Smartwool Women's Merino Sport 120 Hoodie
  • Ultra Violet
  • Black

Smartwool Women's Merino Sport 120 Hoodie

$79.95

icebreaker Women's MerinoFine Long Sleeve Roll Neck Shirt
  • Electron Pink

icebreaker Women's MerinoFine Long Sleeve Roll Neck Shirt

$220.00

On Sale
Smartwool Men's Thermal Merino 1/4 Zip Pullover
  • Charcoal Heather
  • Black

Smartwool Men's Thermal Merino 1/4 Zip Pullover

See Price in Cart

WAS: $120.00*

icebreaker Men's 125 ZoneKnit Merino Thermal Long Sleeve Shirt
  • Fathom Green/Cloud Ray/Cb
  • Ether
  • Black

icebreaker Men's 125 ZoneKnit Merino Thermal Long Sleeve Shirt

$100.00

On Sale
Smartwool Women's Thermal Merino ¼ Zip Pullover
  • Charcoal Heather
  • Black Cherry Heather
  • Purple Iris Floral

Smartwool Women's Thermal Merino ¼ Zip Pullover

$89.97-$120.00

WAS: $120.00*

icebreaker Women's Merino 125 Cool-Lite Sphere III Short Sleeve Shirt

icebreaker Women's Merino 125 Cool-Lite Sphere III Short Sleeve Shirt

$75.00

Smartwool Men's Merino Sport 120 LS Tee
  • Honey Gold

Smartwool Men's Merino Sport 120 LS Tee

$75.00

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Smartwool Men's Everyday Exploration Merino Long Sleeve T-Shirt
  • Deep Navy Heather
  • Medium Gray Heather

Smartwool Men's Everyday Exploration Merino Long Sleeve T-Shirt

$80.00

Smartwool Men's Long Sleeve Heavy Henley Sweater
  • Light Gray Heather

Smartwool Men's Long Sleeve Heavy Henley Sweater

$190.00

Smartwool Men's Merino Sport 150 Short Sleeve Polo
  • Medium Gray Heather

Smartwool Men's Merino Sport 150 Short Sleeve Polo

$80.00

On Sale
Smartwool Men's Button Down SS Shirt
  • Light Grey Heather
  • Black
  • Deep Navy

Smartwool Men's Button Down SS Shirt

$84.95

WAS: $85.00*

Smartwool Men's Everyday Exploration Merino Short Sleeve Polo
  • Black Heather

Smartwool Men's Everyday Exploration Merino Short Sleeve Polo

$80.00

Carhartt Men's Force Mid-Weight Synthetic Wool Blend Base Layer Crew
  • Black Heather

Carhartt Men's Force Mid-Weight Synthetic Wool Blend Base Layer Crew

$44.99

Smartwool Men's Sparwood Crew Sweater

Smartwool Men's Sparwood Crew Sweater

$105.00

SmartWool Men's Short Sleeve Polo T-Shirt
  • Twilight Blue
  • Honey Dew
  • Light Grey Heather

SmartWool Men's Short Sleeve Polo T-Shirt

$80.00

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