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Heavy Expedition - Boot

87 reviews
Size Guide
Coyote Brown
Light Brown

The ultimate combination: Merino wool for cold weather insulation and the performance that comes from a perfect fit. There is no other heavyweight sock that can make this claim. If there were, we would have made it! This sock is loaded with 100% Merino wool on the inside against your foot, so all you feel is comfortable and dry.

  • Heavyweight full-foot cushioning for warmth and protection.
  • Durable nylon exterior for extended wear.
  • Mid-calf height works well with hunting boots.
    Merino Wool 82%
    Nylon 13%
    Polyester 3%
    Lycra® Spandex 2%


    Customer Reviews

    Based on 5 reviews Write a review
    Customer Reviews
    5.0 Based on 87 Reviews
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    Filter Reviews:
    Kathryn G.
    United States United States
    Cushy Comfort

    I am a wildland firefighter and have been for the last 20 years. Prior to discovering FITS I had stuck to Patagonia's heavy duty hike sock, once they no longer made them I tried them ALL! I put in a ton of time hiking tough terrain for work and FITS is my go-to sock. I wear a women's size 7 shoe and found that the Men's medium works best for me.

    Tricia H.
    Again great quality and very

    Again great quality and very comfortable.

    Gregg F.


    Isaac t.
    All day wearing these bad boys

    Awesome socks! Been wearing these for my first Wildland fire season, VERY impressed.

    Alison F.

    So squishy, comfy, and warm. Perfect for someone with eternal cold feet. I can’t wait for fall so I can wear them to the mountains :heart_eyes:

    Jim P.
    Second time around

    Purchased same socks several years ago. Need maximum cushioning due to hip replacement. These are the best. Would not have any other brand.

    Mary B.
    Excellent socks to wear with

    Excellent socks to wear with my boots - very warm..

    Becky C.
    Like hugs?

    Every time I slip this pair of socks on my feet and ankles are delighted. It's the perfect hugging sock for them. I bought a pair for my dad the day after I received mine because they are so awesome. He said they made his feet feel toasty!



    The Perfect Fit Starts With the Right Size.

    Your sock size shouldn’t be a guessing game. Our socks range from small to double XL, but the best way to know the perfect fit for you is to match your shoe size to the chart on the left. That way, you’ll know the size you select will give you the fit and feel you expect.

    Between sizes? Go with your gut, but rest assured that your socks will still fit great. If you receive your order and find yourself wishing you’d gone up or down a size, just let us know. We’ll happily send you replacements for your preferred size.

    Concerned about laundry mix-ups? All FITS® socks are coordinated by color and size, based on the colors you see on the size chart. So, you won’t have to worry about mixing up your sizes with the other FITS® wearers in your home. (But stray socks mysteriously going missing in the dryer? Unfortunately, we can’t help with that.)

    Questions? Let’s talk.