Explore the Collections
Most Popular
Our fan-favorite base made from 100% ZQ Merino wool.
Our fan-favorite base made from 100% ZQ Merino wool.
ClassicThermal
Made for cool to cold weather outdoor activities
- Slim Fit + Plus Size
- Midweight: 250g/m
- Versatile use for colder seasons
Body Temp
Regulation
Regulation
Moister
Management
Management
Odor
Resistant
Resistant
ZQ Wool
Certified
Certified
Most Versatile
Our year-round base made with a Merino blend to maximize durability.
Our year-round base made with a Merino blend to maximize durability.
ClassicAll-Season
Warm to cool weather activities
- Slim fit
- Lightweight: 150g/m
- Worn alone on warm days. A layering foundation on cooler days.
Body Temp
Regulation
Regulation
Moister
Management
Management
Odor
Resistant
Resistant
ZQ Wool
Certified
Certified
Highest-Performing
Our most advanced performance base is 3D-knit to maximize articulation and ventilation.
Our most advanced performance base is 3D-knit to maximize articulation and ventilation.
Intraknit ™ Thermal
High-energy activities in cool to cold weather.
- Slim fit
- Midweight
- Designed for warmth and an enhanced performance
Body Temp
Regulation
Regulation
Moister
Management
Management
Odor
Resistant
Resistant
ZQ Wool
Certified
Certified
Plays hard. Stays cool.
Our newest 3D-knit base designed to help keep you cool.
Our newest 3D-knit base designed to help keep you cool.
Intraknit ™ Active
Year-round high-aerobic activities
- Slim Fit
- Midweight
- Features the natural cooling properties of TENCEL ™ fibers
Body Temp
Regulation
Regulation
Moister
Management
Management
Odor
Resistant
Resistant
ZQ Wool
Certified
Certified
Made to help you stay comfortable, confident,
and outside longer doing what you love.
go far. feel good.™
We think you’ll love our award-winning base layers, but don’t just take it from us. Hear it from the Smartwool community.
Endless comfort starts here.
No matter how you get outside, it’s easy to find your best Merino wool base layer with Smartwool. Whether you need a lightweight Merino wool base layer for year-round adventures or our warmest Smartwool® base layer for every winter outing, we have the comfort you need to go farther. Shop women’s Smartwool® base layers, men’s Smartwool® base layers, and the entire Smartwool® Intraknit™ base layer collection today and explore forever.