Mountaineer - OTC - FITS®

Mountaineer - OTC

43 reviews

Mountaineer - OTC

43 reviews

Size Guide
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The 100% Merino wool interior provides excellent moisture control and comfort while the nylon exterior provides maximum durability and abrasion resistance.

Other critical features include:

  • Berry Compliant.
  • Fully cushioned foot and leg.
  • Merino wool next to skin feels great and is naturally anti-microbial and flame resistant.
  • Nylon reinforcement on the outside of the sock for increased durability.
  • Heel Lock® provides heel security that limits the chances of a blister when combined with a properly fit boot.
  • Dynamic Toe Cup® limits the amount of material in toe box to prevent bunching in a critical area of the foot.
  • Knitted construction naturally moves the seam back from the sensitive toe area.

Material Specifications:

  • 69% Merino Wool
  • 24% Nylon
  • 4% Polyester
  • 3% Lycra

    Designed to be the best socks you've ever worn.

    moisture wicking icon

    Moisture Wicking

    Designed for stay-dry breathability & performance

    full contact fit icon

    Full Contact Fit

    No uncomfortable bunching, slipping, or rubbing

    smart cushioning icon

    Smart Cushioning

    Extra padding in active zones: toe, arch, & heel

    2 year warranty icon

    2-Year Warranty

    Quality-made in the USA & guaranteed to last

    Merino Wool

    All our socks are made with 18.5m superfine knit, suit-grade performance Merino wool.

    • Odor Resistant
    • Antimicrobial
    • Durable

    Omega Performance Yarn

    Our custom blend of man-made fibers selected for the best breathability and fit.

    • Breathable
    • Elastic
    • Moisture Wicking
    Customer Reviews
    4.8 Based on 43 Reviews
    5 ★
    4 ★
    3 ★
    2 ★
    1 ★
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    Filter Reviews:
    Joe P.
    United States United States

    Not what I expected

    I’m am struggling with duplication of a current product I have purchased from you. The mountaineer is way too big and goes over my knees. I am looking for tactical that goes OTC. Can a representative call to discuss in person over the phone? 401-255-8708 Joe Pelletier



    Hi Joe, Thanks for the review! Based on your order history, I believe what you are looking for is the Tactical - Boot in size XL. A customer service rep will reach out to you within 24 hours in case you have any questions. Thanks!

    Steve W.
    United States United States

    Seriously warm heavyweights

    Great for layering. Quality construction and materials. Excellent discount.

    Omar I.
    United States United States


    Very soft feeling on the foot. If you have sweaty feet these are a must.

    DuWayne A.
    United States United States

    Saving for winter

    Good fit. Not too thick so my hiking boots aren't too tight. socks fit tight enough to stay on my skinny legs with plenty of stretch left.

    Monte S.
    United States United States

    Great fits

    These gotta be the best ever

    Dean D.
    United States United States

    Mountaineer over the calf socks

    These socks are long. I wear a size 13 and they go over my knees. I fold them back to just below my knees. I always had problems with rubber boots rubbing my shins. Not now. These socks protect my shins. The wool wears well and is comfortable. Great socks. Not too thick but thick enough to protect my feet and shins. They stay up.

    Constance G.
    United States United States

    Too Tall

    I have loved these in the past but these are just too tall. They have the same excellent thickness and construction, just too tall.

    Jennifer N.
    United States United States

    Amazing socks

    Wow. I love these socks bought the. Bc they were on sale and they are wonderful! Perfect boot socks!


    Sock Sizing
    women and men size chart

    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.)


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    How Do You Determine Sock Size?

    Sock sizes are typically measured in inches, not by your shoe size. So, a sock size 6-8 will comfortably fit someone whose feet are between six and eight inches long. However, at FITS®, we make it easy for you to choose the ideal sock size without having to measure your foot. Simply use our sock size conversion chart based on your shoe size to select the right fit for you. 

    How Do You Measure Your Foot for Socks?

    To measure your foot for socks, measure the length from the heel of your foot to the tip of your longest toe. The measurement in inches correlates to your sock size. For example, if your foot is 10 inches long, a sock size 9-11 should fit you comfortably. At FITS®, you can skip this step and find your sock size based on your shoe size using our conversion chart. 

    What Is the Sock Size Conversion?

    The sock size conversion refers to sock size compared to shoe size. While all companies may vary slightly on which size socks to purchase based on your shoe size, you can always measure your foot to find the right fit for you. 

    What is Sock Size to Shoe Size?

    Because sock sizes are determined by the length of your foot in inches vs. your shoe size, shoe and sock sizes differ. The FITS® sock size to shoe size conversion is as follows:

    Knowing this makes it easy to choose the ideal sock size based on your shoe size without measuring your foot. 

    What Age is Sock Size 9-12?

    Sock sizes typically don’t correlate with age. For kids, age can be a general indicator of what size sock they’ll need, but everyone is different. An adult sock size 9-12 fits anyone whose feet are approximately nine to twelve inches long. For kids’ sock sizing, check with the company to find exact details to ensure your little one gets the perfect fit. 

    Got more questions about finding the perfect sock size for you? Let’s talk.



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