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3.0 Women's Thermawool® Merino Half Zip

$75.00 TW9034-979S
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The secret of our Thermawool® is blending merino wool with just the right number of microfibers to make the ideal technical thermal fabric to breathe and manage moisture. Thermawool® has the benefits of Merino Wool with a soft fleece against your skin. Our Thermawool® Half Zip is ideal for a layering piece or on its own. It works great on its own or with the Thermawool® Pant.


  • Thermoregulation Technology keep you warm and dry
  • Merino Wool blend / Brushed Microfiber for comfort and warmth 
  • UPF Rating 50+ for great sun protection
  • All flat seam construction to prevent chafing


  • Climasense fiber fusion is designed to regulate your optimal temperature 
  • Thermoregulation technology provides comfort through a wide range of temperatures 
  • UPF rated for sun protection 
  • Odor Control neutralizes sweat and odor 
  • Moisture Management moves moisture from the skin to keep you warm and dry

    Customer Reviews

    Based on 5 reviews
    Jaime Lopez
    Showing the love

    some years ago I bought a set of bottoms for myself to go to Alaska. I loved them so much that I got a 3.0 thermawool top for my wife. She loves it so much that I will be getting her the bottom half. Great product and great quality.

    Jan Miller
    Perfect weight

    The 3.0 are the perfect weight for Spring, Fall, and Winter. I used to buy only 100% merino wool but I actually like this blend better. It's warmer and maintains its shape better.

    My fav shirt

    I bought this a few years ago and it’s become my go-to shirt for cold weather outdoor activities. Soft and warm, thin enough for layers.That’s why I’m back to buy a few more colors.


    This is a great top, no smell when I wore it all day skiing. Comfortable and warm!

    annette fordyce
    love it

    This is the most comfortable, warmest and best looking base layer top I have ever owned.