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XJ Running Socks

Unisex crew

$14.99 - $15.99
Clinically-Tested Padding for maximum protection
White / Navy


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
Color: white / navy
White / Navy
White / Navy
White / Platinum
White / Platinum
Shoe Size

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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
Select your gender and size

Thorlos Guarantee: Thorlos Brand Promise,
Your feet will feel better or your money back®.

1467 Reviews

4.9/5 overall rating
  • 5/5

    Best socks overall


    I bought the XJ for my husband. He loves them. They feel good and he likes the extra padding on heels and toes.

  • 5/5

    Well designed


    These are so comfortable! This is what I would wear for a long day on my feet.

  • 5/5

    Good for walking.


    These socks provide very good cushioning for my feet when walking. I do wish however you would make the crew style with the material used in the distance walker sock and make them in all white.

  • 5/5

    Time tested best sock out there.


    Thorlos are the best sock made! I've worn them as a runner and bicycle rider for the past 40 years as well as for everyday wear. Nothing compares to the cushioned comfort of Thorlos.

  • 5/5

    Cushion and comfort!!


    Super, I have been wearing Thorlo since 1992!

  • 5/5

    Everyday SOCKS


    I am not a runner but I wear these socks everyday - I like the cushioning and they last a long time. I would definitely recommend these socks for any activity - not just running.

  • 5/5

    Love the cushion on these socks


    I deal with plantar fasciitis from time to time, so I really appreciate the extra support while walking, standing or running.

  • 5/5

    Very comfortable


    I have peripheral neuropathy is both feet, so must wear only the best in socks and sneakers. Those of us who have no feeling in our feet must always be mindful of blisters and foot ulcers which can develop without our knowledge. The Thorlos brand was recommending to me years ago, and I have bought nothing but since then.

  • 5/5

    Best socks for running


    The support and cushion my feet while running.

  • 4/5

    Different from original.


    Maybe it's my imagination, but the socks I that are being made now seem thinner than those I use to purchase and don't seem to last as long, showing wear on the soles and heels rather quickly. I have purchased Thorlos for years as a runner and loved them. These are still the best I can find, but I am wondering if there was a change in the yarns they are now using.