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Women's Thermal Underwear & Best Baselayer

Warm Baselayer Tops, Baselayer Pants & Women's Long Underwear

Our women’s long underwear is designed to keep you cozy and comfortable on outdoor adventures, even when the weather drops below freezing. Our women’s thermal underwear is made of special high-performance thermal fabric that not only maintains your body's heat, but also actually generates heat by absorbing and wicking away body moisture to keep you cozy and dry. Naturally insulating, our best baselayer clothing is breathable enough to prevent overheating. Our warm baselayer tops and pants are so warm and comfortable you’ll forget about the cold and focus on doing what you love.

Our women’s long underwear is designed to fit your body perfectly, because comfort is always our priority. When you choose our thermal long underwear to keep you warm doing the winter activities you love, you can be sure you’ll find them in our full range of sizes, made for plus, petite, regular, tall, petite plus, and tall plus bodies. We know the best baselayer clothing is versatile and easy to layer– try mixing and matching our silk baselayer tops and bottoms with our thermal long underwear for extra warmth on a ski trip, or wear them under jeans for a brisk walk around your neighborhood on a chilly fall day. Our warm baselayer tops and pants are so indispensable, we’re confident you’ll fall in love, Guaranteed. Period.® If you’re not satisfied with any item, simply return it to us at any time for an exchange or refund of its purchase price.

Bundle up in our women’s long underwear when the weather gets cold, because having the best baselayer clothing can mean the difference between creating a winter memory that’ll last a lifetime, and a cold, wet nightmare you’ll wish you could forget.

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  • Women's Silk Interlock Pants
    Women's Silk Interlock Pants Women's Long Underwear Pants & Warm Long Underwear
    $64.95
    3.7
    3.7 (76)
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    Women's Silk Interlock Pants

    Silk Long Underwear Pants, Warm Long Underwear & Women's Underwear

    Warm Silk Long Underwear, Base Layer Pants, Thermal Underwear & Women's Clothing Some days you just can’t shake the chill in the air. Whether you’re at home or at the office, silk longies add an extra layer of warmth. They’re super light so you won’t even realize you’re wearing them. A natural insulator, silk’s hollow fibers are the key to its warming power. Wonderfully soft, you’ll love the way it feels next to your skin.
    3.7
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  • Women's Thermaskin Heat Pants
    Women's Thermaskin Heat Pants Women's Long Underwear Pants & Warm Long Underwear
    $29.95
    4.2
    4.2 (147)
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    Women's Thermaskin Heat Pants

    Best Long Underwear Pants, Base Layer Pants & Women's Clothing

    Warm Long Underwear, Base Layer Pants, Thermal Underwear & Women's Clothing If it’s one thing Wisconsin winters have taught us, it’s that staying warm starts with a good base layer. Our Thermaskin™ Heat Pants not only provide an extra bit of warmth, they’re super soft and comfortable too. The high-performance fabric actually helps generate heat by absorbing body moisture. It also wicks perspiration away from your skin, which is crucial for comfort in cold weather. 
    4.2
    4.2 (147)
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      $29.95
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      $29.95
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      $29.95
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      $29.95
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  • Women's Silk Interlock Tank
    Women's Silk Interlock Tank Women's Silk Thermal Underwear & Base Layer Shirts
    $54.95
    4.5
    4.5 (37)
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    Women's Silk Interlock Tank

    Long Silk Underwear Shirts, Base Layer Shirts & Women's Clothing

    Long Silk Underwear Shirts, Base Layer Shirts, Silk Underwear & Women's Clothing Silk longies are a super light layer that works under everything - even tailored clothing. A natural insulator, silk’s hollow fibers are the key to its warming power. It holds in body heat, plus wicks away moisture. Wonderfully soft, you’ll love the way it feels next to your skin.
    4.5
    4.5 (37)
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      $54.95
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  • Women's Silk Interlock Crewneck
    Women's Silk Interlock Crewneck Women's Silk Thermal Underwear & Base Layer Shirts
    $64.95
    4.1
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    Women's Silk Interlock Crewneck

    Silk Thermal Underwear, Long Silk Underwear Shirts & Women's Underwear

    Long Silk Underwear Shirts, Base Layer Shirts, Silk Underwear & Women's Clothing Silk longies are a super light layer that works under everything - even tailored clothing. A natural insulator, silk’s hollow fibers are the key to its warming power. It holds in body heat, plus wicks away moisture. Wonderfully soft, you’ll love the way it feels next to your skin.
    4.1
    4.1 (49)
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