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XJ Running Socks

Unisex crew

Designed for feet that hurt. Enjoying short but intense runs or going long distances on all terrains, in most weather conditions resulting in moderate to significant stress on the foot. Specifically engineered to deliver maximum protection and comfort in the critical strike zones for any runner prone to blisters, foot pain or discomfort.

Product details below

Fiber Contents: 88% Exclusive THOR•LON® Acrylic , 10% Stretch nylon , 2% Spandex

Running Socks

Unique padding specifically designed for Running

The Design of Thorlos Padded Running Socks

Insights into the design, development and testing of Thorlos activity-specific, clinically-tested padded running socks from David Varsik, THORLO's senior design engineer.

What Independent Clinical Studies Say About Thorlos

Thorlos padding has been the subject of eight independent clinical research studies that were published in peer-reviewed medical journals. The results showed the proprietary padding reduces foot pain, blisters and other foot conditions, pressures on the foot and moisture.


  • Constructed with THOR•LON® fibers for superior softness, resilience, durability, and moisture-wicking for drier, better feeling feet.
  • Cushioning over the toes to help protect against runner’s toe.
  • Flat knit instep and cushioning in arch for better fit, more support and less pressure on the feet for a more comfortable run.
  • Low profile toe seam won’t rub or irritate the feet.
  • Unique padding specifically engineered for running, clinically shown to reduce blisters, pain, pressures and moisture for maximum protection.

Product Details

  • Length: crew
  • Cushion: Thick Cushion
  • Fiber Contents: 88% Exclusive THOR•LON® Acrylic , 10% Stretch nylon , 2% Spandex
  • Care instructions: For longer product life, maximum protection and comfort, wash and dry inside out (to fluff up the pads) using liquid fabric softener after each use (to lubricate the fibers for longer life). For optimal benefits, liquid fabric softeners are always recommended. Do Not Bleach. Wash Normal: 105F/40C. Dry Normal Medium. Do Not Dry Clean. Do Not Iron.
  • Proudly made in the USA

1560 Reviews

4.9/5 overall rating
  • 5/5

    My old Thorlos (at least 20 years old!) are finally wearing out, so I bought some new ones :-)


    I love love love these socks! It is like walking on padding. Between the Thorlos and the Brooks shoes, my achy brakey feet feel sooooo much better by the end of the day. I have plantar fascitis, a cracked right heel bone and Achilles tendonitis on my right foot, so these socks and shoes are the reasons I still am able to walk.

  • 5/5

    favorite socks ever


    There's nothing like spending your day wearing thorlo socks. They are my absolute favorite piece of clothing. When I wear my thorlos, I know I am giving my feet the best chance for a day with fresh feet. No tiredness or soreness. They have a cushion that does not go away. My kids and wife know that there is no greater present for me at the holidays or a birthday, than a new pair of thorlo socks. It might sound silly, but it's true. They are that happy for me.

  • 4/5

    Very good--but not the best


    Not as good as when I had my previous pairs on, because this XJ doesn't have as much padding in the toe and heel as the previous pair did--bought about a year ago.

  • 5/5

    Soft, well-padded


    Bought these for someone with sensitive feet. He loves that they are soft inside and well-padded. They are fairly thick, so are fine for winter wear for those who can't tolerate wool.

  • 5/5

    30 years of wearing Thorlos, and they're still great!!


    I have been wearing this style of Thorlos for over 30 years, and they continue to keep my feet going. They are my go to socks for hitting the streets!

  • 5/5




  • 5/5

    Best socks for standing on hard floors


    My feet feel warm and comfortable with the extra padding they offer.

  • 5/5

    Best socks there are!


    They are great! Only they are cheaper. I wear them everyday because they are the only ones that fit my feet snugly. Since the price is high I can only buy on sale or a few at a time. The comfort is the best!!!!

  • 5/5

    Best socks ever


    Best cushioning in a sock - very comfortable, have been wearing them for years for both running and every day use. Highly recommend

  • 3/5



    disappointing. not as heavy as I expected.