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Darn Tough RFL Over-the-Calf Ultra-Light

photo: Darn Tough RFL Over-the-Calf Ultra-Light snowsport sock

Ultra-light, thin ski sock allows more contact with your boots. Merino wool keeps you warm. Guaranteed for life.


  • Lifetime Guarantee
  • Merino wool for warmth and odor control
  • Seamless construction


  • Not a lot of cushion

There is a reason why Darn Tough socks are the number one sock for long distance hikers. You can start with their lifetime guarantee. As crazy as it sounds they will replace your socks no matter what the reason. Dog, ate it, too close to the campfire, they don't care. With a guarantee like that, you would expect the socks to be great and they are.

These super thin over-the-calf socks in a medium size fit my size 9 feet perfectly. Being seamless they are very comfortable, with nothing to cause any irritation. My ski boots are foam filled so they are very responsive, when paired with these thin socks I feel a greater connection to the ski and consequently the snow. Warmth has been good down to 25 degrees Fahrenheit.

When on a trip where I was forced to wear the socks on more than one day that Merino wool anti-microbial action was greatly appreciated by my spouse. I also wore these a lot in the springtime for hiking and two backpack trips. I am a fan of thin socks when hiking and these filled the bill nicely.

Paired, one trip with Altra mid height Gortex boots and another trip with Sketchers trail runners they worked well with both types of footwear. With temperatures in the 50-60 degree range, my feet never overheated with either footwear. When they got wet during a stream crossing with the trail runners the wool still kept my feet warm and dried out pretty quickly.

For people who are not a fan of thin socks for snowsports or hiking, Darn Tough makes a sock with a thickness and cushion that will anyone's need. My feeling is you can't go wrong with Darn Tough socks.


Source: tested or reviewed it for the manufacturer (I kept the product after testing.)

Disclosure: The author of this review received a sample of the product from the brand or its representative in exchange for a review.

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Price MSRP: $24.00
Historic Range: $23.95
Price Historic Range: $23.95
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