Merino Wool Lightweight Base Layer

Discover the ultimate comfort and performance with our merino wool lightweight base layer collection. Designed for optimal warmth and breathability, these base layers are perfect for layering in any season. The natural moisture-wicking properties of merino wool keep you dry and comfortable, while its softness ensures a snug fit against your skin. Ideal for outdoor adventures or everyday wear, our lightweight options provide flexibility and ease of movement. Elevate your wardrobe with versatile base layers that combine functionality and style effortlessly.

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135 products
View:  4896All|135 Products
SmartWool Women's Merino 150 Base Layer Bottoms
  • Black

SmartWool Women's Merino 150 Base Layer Bottoms

$90.00

SmartWool Merino 150 Base Layer Long Sleeve Shirt
  • Black

SmartWool Merino 150 Base Layer Long Sleeve Shirt

$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*

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

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

$90.00

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

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

Smartwool Women's Intraknit Thermal Merino Crew Baselayer Top

$130.00

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*

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*

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

Smartwool Women's Merino 250 Pattern Crewneck Baselayer Top

$82.97-$110.00

WAS: $110.00*

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

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 150 Baselayer Bottom
  • Black

Smartwool Women's Merino 150 Baselayer Bottom

$67.97

WAS: $90.00*

SmartWool Women's Intraknit Active Base Layer Bottoms
  • Black

SmartWool Women's Intraknit Active Base Layer Bottoms

$110.00

On Sale
Smartwool Women's Classic Thermal Merino Baselayer Bottoms

Smartwool Women's Classic Thermal Merino Baselayer Bottoms

See Price in Cart

WAS: $115.00*

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

SmartWool Women's Intraknit Active Base Layer Long Sleeve Shirt

$110.00

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

Smartwool Women's Thermal Merino Rib Top

$130.00

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

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

$130.00

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
  • Deep Navy
  • Black

Smartwool Women's Intraknit Thermal Merino Pattern Baselayer Top

$96.97-$130.00

WAS: $130.00*

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*

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

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

Smartwool Youth Merino 250 Pattern Crewneck Baselayer Top

$60.00

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 Merino 250 1/4 Zip Baselayer Top

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

$89.97-$120.00

WAS: $120.00*

Smartwool Women's Thermal Merino Rib Turtleneck
  • Bleached Aqua Heather

Smartwool Women's Thermal Merino Rib Turtleneck

$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 Baselayer Crewneck Shirt

Smartwool Men's Merino 250 Baselayer Crewneck Shirt

See Price in Cart

WAS: $115.00*

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

Smartwool Women's Thermal Merino Crew

$120.00

Smartwool Youth Merino 250 Baselayer Bottom
  • Power Pink

Smartwool Youth Merino 250 Baselayer Bottom

$49.97-$60.00

WAS: $60.00*

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

Hot Chillys Men's Clima-Wool Merino Bottom

See Price in Cart

WAS: $125.00*

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 Thermal Merino Pattern Crew
  • Black Mountain Print
  • Laguna

Smartwool Thermal Merino Pattern Crew

$81.97

WAS: $110.00*

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

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 Merino SS Tee

Smartwool Women's Merino SS Tee

$79.95

WAS: $80.00*

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

Smartwool Women's Thermal Merino ¼ Zip Pullover

$89.97-$120.00

WAS: $120.00*

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 Merino 250 Baselayer Leggings

Smartwool Women's Merino 250 Baselayer Leggings

$85.97-$115.00

WAS: $115.00*

Smartwool Women's Merino Tank
  • Twilight Blue

Smartwool Women's Merino Tank

$69.95

Icebreaker Women's Merino 150 Tech Lite III T-Shirt

Icebreaker Women's Merino 150 Tech Lite III T-Shirt

$80.00

icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt
  • Black

icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt

$85.00

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

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

$85.00

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt
  • Glow
  • Midnight Navy
  • Black

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt

$80.00

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt
  • Graphite

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt

$85.00

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt
  • Lux
  • Ecru Heather

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt

$85.00

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt
  • Dawn
  • Black

Icebreaker Women's Merino 150 Tech Lite III Short Sleeve T-Shirt

$80.00

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

Halfdays Women's Fay Merino Baselayer Top

$130.00

Smartwool Merino 150 Baselayer Pants
  • Black

Smartwool Merino 150 Baselayer Pants

$90.00

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

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

$60.00

icebreaker Men's Merino 150 Tech Lite III T-Shirt

icebreaker Men's Merino 150 Tech Lite III T-Shirt

$100.00

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

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

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

$75.00

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*

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

Smartwool Women's Thermal Merino Pattern Crewneck Long Sleeve Shirt

$81.97

WAS: $110.00*

Smartwool Men's Merino SS Tee

Smartwool Men's Merino SS Tee

$80.00

On Sale
Smartwool Women's Thermal Merino Boxed 1/4 Zip
  • Black/Charcoal Heather

Smartwool Women's Thermal Merino Boxed 1/4 Zip

See Price in Cart

WAS: $125.00*

icebreaker Men's Merino 150 Tech Lite III Short Sleeve T-Shirt
  • Black
  • Dawn

icebreaker Men's Merino 150 Tech Lite III Short Sleeve T-Shirt

$85.00

icebreaker Men's Merino 150 Tech Lite III Short Sleeve T-Shirt
  • Dawn

icebreaker Men's Merino 150 Tech Lite III Short Sleeve T-Shirt

$85.00

SmartWool Women's Active Ultralite High Neck Tank Top
  • Winter Sky
  • Black
  • Twilight Blue

SmartWool Women's Active Ultralite High Neck Tank Top

$55.00

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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 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 Classic Thermal Merino Base Layer Pattern Quarter Zip Pullover
  • Deep Navy Color Shift
  • Charcoal Heather

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

$89.97-$120.00

WAS: $120.00*

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

Smartwool Women's Thermal Merino Turtleneck Ribbed Sweater

$120.00

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*

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

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