Women's Wool Base Layers
Classic Thermal
Merino Base Layers
- - Cool to cold weather
- - All activities
- - Sizes XS-4X
- - 250 g/m
Classic All-Season
Merino Base Layers
- - Cool to warm weather
- - All activities
- - Sizes XS-4X
- - 150 g/m
Women’s Plus Merino
Base Layers
- - Available in Classic Thermal & Classic All-Season
- - Tailored plus-size fit
- - Sizes 1X-4X
Intraknit™
Base Layers
- - Cool to cold weather
- - High intensity activities
- - Sizes XS-XL
26 Products
New Colors
Women’s Merino Wool Base Layers
Start your adventure and everyday wear with Smartwool's women's base layers collection, crafted to ensure you stay warm, dry, and comfortable in any setting. Our base layers, designed with the dynamic woman in mind, are the ultimate foundation for outdoor enthusiasts, athletes, and anyone who values the natural performance of Merino wool.
From the Classic All-Season Merino Wool Base Layers ideal for all seasons or high-intensity activities, to the warmth of our Classic Thermal Merino Wool Base Layers for colder adventures, our collection offers something for every condition and preference. For those seeking inclusive sizing, our Women's Plus Size Base Layers ensure every woman can find her perfect fit and enjoy the outdoors.
Experience the innovation of Intraknit™ Base Layers, featuring body-mapped ventilation and insulation zones for optimal thermal regulation and flexibility. With these technical advancements, combined with the softness and durability of Merino wool, our base layers are among the best Merino wool base layers available, providing comfort and performance in all your pursuits.
Want to shop locally? Smartwool is sold across 5,000+ stores in the U.S. Find one near you with our Store Locator tool.
Women’s Merino Wool Base Layers FAQs
Q: How should women’s base layers fit?
A: Base layers should fit snugly against your skin to maximize moisture wicking and thermal efficiency without restricting movement. They're designed to act as a second skin that moves with you, offering warmth and comfort.
Q: What are base layers for?
A: Base layers are designed to keep you comfortable in a variety of conditions by managing moisture, providing insulation, and regulating body temperature. They are the foundation of layering for outdoor activities, offering protection against the elements.
Q: Are merino wool base layers itchy and okay to wear next to skin?
A: Our Merino wool base layers are crafted from fine fibers that are softer and more flexible than traditional wool, ensuring a comfortable, itch-free experience. They're designed for sensitive skin and provide all-day comfort.
Your complete guide to Merino wool.
Naturally versatile, renewable, and totally comfortable. Learn more about Merino wool and all the benefits that come with wearing it for all your outdoor pursuits.
How to wash Merino wool.
We love Merino wool for its natural odor-resisting and moisture-managing abilities. Whether we’re running, biking, hiking trails, hunting, and skiing or snowboarding, Smartwool socks, base layers, and apparel help us keep us comfy and dry all day long.
Smartwool Size Chart
We want you to be 100% satisfied and comfortable with your Smartwool purchase. Our sock, clothing, and accessories size charts are specifically designed to help you find the best fit for men’s, women’s, and kids’ Smartwool products.
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