Merino Wool & Merino Blend Base Layers
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Merino Wool Base Layers
Explore our collection of Merino wool base layers designed to keep you comfortable, warm, and dry on any adventure. At Smartwool, we understand that a great base layer is the foundation of any outdoor outfit. Our Merino wool base layers are crafted to provide exceptional comfort and performance, whether you're hitting the slopes, hiking in chilly weather, or just layering up for everyday warmth.
Our base layers are made from the finest Merino wool, known for its natural breathability, quick-drying properties, and softness against the skin. These layers help regulate your body temperature, keeping you warm when it’s cold and cool when it’s hot, making them perfect for year-round use. With options ranging from lightweight to midweight and heavyweight styles, you can find the right base layer to suit any activity or climate.
From our classic men's Merino wool base layers and women's Merino wool base layers to our selection for kids, our base layers are designed to fit all bodies and all activities. Whether you need a slim fit for high-intensity activities or a more relaxed fit for everyday comfort, our base layers are made to move with you, providing a second skin that improves your performance.
Each piece in our collection is carefully crafted to regulate temperature, manage moisture, and resist odors, keeping you comfortable and fresh throughout your adventure. Plus, with Smartwool’s commitment to sustainability and responsible sourcing, you can feel good about your gear, knowing it’s made with care for both people and the planet.
Want to shop locally? Smartwool products are available at over 5,000 stores across the U.S. Use our Store Locator tool to find a location near you.
Merino Wool Base Layer FAQs
Q: What is the difference between Smartwool's lightweight and midweight base layers?
A: Our lightweight base layers, such as the Merino 150, are designed for warmer conditions like spring skiing or high-energy activities such as cross- country skiing, providing breathability and moisture management. Midweight options like the Merino 250 offer more insulation and are better suited for colder environments like winter skiing or slower-paced activities like winter hiking.
Q: Can I wear Smartwool base layers as standalone tops?
A: Absolutely! Many of our base layers are designed to be worn on their own. Their versatile stylish cuts, breathability and moisture management make them perfect for everyday wear and casual activities
Q: Are Smartwool base layers bulky when worn under other gear?
A: No, our base layers are designed to be thin and lightweight, ensuring they fit comfortably under other layers without adding unnecessary bulk. This allows you to move freely while staying warm and comfortable.
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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