Lightweight Rugged - Merino Wool Crew Sock | FITS®

Light Rugged - Crew

76 reviews

Light Rugged - Crew

76 reviews

Size Guide
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  • A true rugged sock in a lighter weight. Don’t let the “light” in the name fool you; this sock is no lightweight when it comes to comfort, durability and all the heavy-duty work you can throw at it.

    • Our patented Full Contact Fit® hugs the contours of your foot and stays put so there are no loose socks to rub you the wrong way.
    • Full Merino wool cushion under foot with lightweight upper.
    • Excellent thermal insulation and moisture control.
    • Nylon exterior for durability.
    • Crew height rises just below the calf.
    Merino Wool 62%
    Nylon 28%
    Polyester 7%
    Lycra 3%

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


Moisture Wicking

Designed for stay-dry breathability & performance


Full Contact Fit

No uncomfortable bunching, slipping, or rubbing


Smart Cushioning

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


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



Omega Performance Yarn

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



Moisture Wicking

Customer Reviews
4.8 Based on 76 Reviews
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Paul S.
United States United States

Outstanding Socks!

The best socks that I’ve ever worn. Comfortable, great moisture control, wears well.

Linda H.
United States United States

Really like my Fit socks

I am a fan of the Fit socks. I use them in Florida for hiking in the forest - chores around the farm, horseback riding and everyday use. They hold up well. Also, keep the dirt from you toes even in running shoes. Great product.

Kennard H.
United States United States

Happy Feet

I’ve used the Light Hiker for years but at the suggestion of one of your customer service reps, I tried the Light Rugged. I wear size 10-1/2 shoes and tried the Extra Large per the sizing table. They were too large and I went down to Large, which fits perfectly. I really like the Marino wool inner layer and the extra cushioning it provides. I’ll find out if the synthetic outer layer aids in durability over the next year.

David W.
United States United States


My new socks are working out just fine

Elliott P.
United States United States

great socks

so i finally wore out my FITS after 5 years. wish i knew where to repurpose them. such comfort!

Peter H.
United States United States

Old Man Ruck Club

I am the cofounder of a group of men called the Old Man Ruck Club in Papillion. Once a member commits to the group we purchase a pair of Fits Socks for him. As we know he is serious about our group we gift him a serious pair of socks.

Brandon S.
United States United States

Basically perfect.

Excellent sock. Basically perfect. Very comfortable on the inside. Touch shell on the outside. Stays up the leg better than other brands. I do not recommend washing inside out like FITs does. My last pair of these shed way too much wool doing that.

Marcelo C.
United States United States

Fits fit

Unlike ordinary socks that “fit size 6-13” these really fit well. Best socks I’ve ever had.


Sock Sizing

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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The Light Hiker is perfect for everything from big adventures to everyday wear.
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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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