Free shipping on orders of 3 or more. US only

TRMX Trail Running Socks

Unisex Ankle

Designed for feet that hurt. Enjoying running off road, on most terrains and in moderate weather conditions resulting in low to moderate stress on the feet. Specifically engineered to deliver protection and comfort in the critical strike zones for any trail runner prone to blisters, foot pain or discomfort.

Product details below

Fiber Contents: 27% Exclusive THOR•LON® Acrylic , 4% Spandex , 55% THOR•WICK® COOL , 14% Nylon

Trail Running Socks

Unique padding specifically designed for Trail Running

Why Thorlos?

Watch and see how Thorlos clinically-tested padding reduces blisters, pain, pressures and moisture—and make your feet feel better, guaranteed.

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 THORLON® blended with THOR•WICK® COOL fibers for superior softness, resilience, durability and extra moisture-wicking for drier, cooler, better feeling feet.
  • Cushioned instep and arch for a 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 trail running, clinically shown to reduce blisters, pain, pressures and moisture.

Product Details

  • Length: Ankle
  • Cushion: Moderate Cushion
  • Fiber Contents: 27% Exclusive THOR•LON® Acrylic , 4% Spandex , 55% THOR•WICK® COOL , 14% Nylon
  • 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

149 Reviews

4.7/5 overall rating
  • 5/5

    Best socks for work outs.


    I am an older active person. As such, I no longer have the fat pads in my feet to protect bones from trauma. These socks protect my feet and greatly deminished the need for pain relief following an active day.

  • 5/5

    Thorlo Quality


    Love the fit and feel. Wear with my hiking boots.

  • 5/5

    Great Feel!


    These socks are very well-cushioned and feel great with a sneaker on. I ordered the x-large, which is supposed to cover sizes 13-15. The only negative comment that I might have is that the sock is a little on the small side for its intended target audience. A little more length would make them even more comfortable.

  • 5/5

    Great cushion for trail hiking


    These socks feel soft and have plenty of cushion. They are low enough to let my legs get to the sun and air and high enough to cover the tops of my trail running shoes.

  • 5/5

    every day


    If you like a short sock can not do better then these

  • 4/5

    Firm grip


    Sock feels a little tighter than other styles, and grip around angle is firm.

  • 5/5

    Long long time customer


    I bought a very large quantity of a very similar model of these socks from Thorlo a long time ago. Just rotate them through the days and they finally started too get thin. Simply went online and bought another round. No decision to be made. Love em!

  • 5/5

    Kept me on my feet...


    I am 69 y/o and have very bad feet - old fractures, sprains, bunion, etc. - not the kind of feet to have to wear heavy work boots and be working on concrete floors. These TRMX were a summer substitute for the combat boots socks I usually wear and they were wonderful - just what I needed. Not only was the padding more than adequate, but they never rode down into my work shoes AND the short height let me have a tan down to my ankle! I am a dedicated Thorlo customer - they make quality socks and the customer service is knowledgeable and friendly.

  • 5/5

    Great color to match my black tennis shoes


    These socks are so comfortable it's hard to tell I have shoes on.

  • 2/5

    Not impressed with this product


    I have used the Thorlo JMX RUNNING SOCKS for years and would highly recommend this product. However, the TRMX TRAIL RUNNING SOCKS just did not work for me. I trail run quite a bit and have completed several trail marathons so this was not something I was just trying. These socks gave me blisters for relatively short runs so no way I would try them on long runs or races.