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J Running Socks

Unisex rolltop

$13.99 - $14.99
Clinically-Tested Padding for maximum protection
White / Platinum


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 / platinum
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: rolltop
  • Cushion: Thick Cushion
  • Fiber Contents: 86% Exclusive THOR•LON® Acrylic , 13% Stretch nylon , 1% 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®.

538 Reviews

4.9/5 overall rating
  • 5/5

    "J's" are unusually good socks.


    They provide great friction free cushioning for any run from a mile to a marsthon. I trained in them for ten years and used them for many more years every day as a coach at practice. My teams were encouraged to use "j's as their team issued sock throughout the bulk of my 37 years as a head coach. Incidently, I have pairs that I use for work around the farm that are over ten years pld and are thin, but resilient as ever. They wear like iron and they are as soft as lamb's wool. If you want a sock, buy Thorlo, but be careful they will walk with you for years !!

  • 5/5

    My husband loves these!


    Great. Good cushioning, good fit overall. I keep ordering these same socks, although they last a long time. Thorlos are the best-made, best-fitting socks we've ever owned. My husband, marathon-running daughter, & I (avid walker) wear Thorlos pretty much exclusively except for dress socks. We each have several styles for different purposes, & as long as they make them, we'll be buying them.

  • 5/5

    Best socks for comfort.


    Very comfortable

  • 5/5

    triathlon sox


    Started wearing these in the 80s at the Mrs Ts chicago triathlon. Have worn them since. Comfortable, and soft, easy to wear in shoes and when your shoes are off.

  • 5/5

    Great support!


    like I am walking on pillows! gives me super support when running/workout classes

  • 5/5

    Comfortable socks for everyday use!


    I love the cushioning effect of the thick sole and the roll top does not cut off circulation or cut into my ankle.

  • 5/5

    Running socks


    Exceptional comfort and support for long distance running.

  • 5/5

    Best socks for every day


    Very comfortable and they last for years!

  • 4/5

    Very comfortable, fabric could use a small improvement


    These socks are very comfortable and really do make my feet feel good during and after a long walk. I'm not 100% certain the sizing is accurate; they feel large to me even though I ordered the "correct" size. The biggest issue I have is that the fabric on the outside of the socks are showing a bit of wear after just one wearing. I'm not sure why, but until I see how they hold up over a few wearings, I'm going to hold off on ordering more.

  • 5/5

    best socks ever


    Have been using thorlos for over 15 years now. Won t wear anything else