Lightweight Rugged - Merino Wool Crew Sock | FITS®

Light Rugged - Crew

91 reviews

Light Rugged - Crew

91 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 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 91 Reviews
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Cindy B.
United States

Great socks

These socks will be great for winter.

Kevin J.
United States United States


All good... I like them.. Will get more as needed..

Ann F.
United States United States

light rugged crew

I love my new socks. I especially want to thank the woman in Customer Service that I talked to a while back. I had sent 2 pairs of socks back to you to be mended and I sent them to wrong address, hence they got lost. She was very generous in offering me 2 new pair of socks and I am ever grateful. Please thank her, Ann Fuller

Timothy F.
United States United States

Excellent as everyday socks

For the last 8 years or so, these have become my go-to, not just for hiking but for business casual and everyday casual wardrobes. A sojourn in the Marine Corps left me with a persistent interest in quality footwear. The FITS Light Rugged Crew socks have the best fit, support, durability and (this is key) versatility I've found.

Arrenvy B.
United States United States

Great thick sock

The sock is thick, but not so thick that it's sweaty. Definitely not as soft as the Light Hiking sock, but soft for what it is!

Blaine W.
United States United States

Rugged initial

The fit is nice. Seem to be well made and comfortable. Haven't really worn outdoors yet. A better review would be about a year after this purchase.

Phyllis F.
United States United States

A Winner!!

I purchased these as a gift—my friend is ALL about them! Loves the fit and the cushioning. I’ve been a fan for several years….and now you have another! My only constructive critique would be that the socks look much lighter online.

Lee R.
United States United States

Fabulous socks

I've tried several different brands of socks and the Fits are the only ones that held up, didn't wear out and stayed up on my calves.


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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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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