Thorlos ST Mountaineering Socks

The Thorlos ST Mountaineering Socks are engineered to provide maximum protection in sub-zero weather, on all terrains including extreme summit conditions where foot protection is critical. Specifically engineered to deliver the maximum protection and comfort for any mountaineer prone to blisters, foot pain, or discomfort.

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20+ Years In Business

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  • 100% wool toe for maximum warmth, and low profile toe seam won't rub or irritate feet
  • Constructed with THOR•LON® blended with thermal fibers for extra insulation, superior softness, resilience, durability and moisture-wicking for drier, warmer, better feeling feet.
  • Cushioned instep and arch for a better fit, more support and less pressure on the feet for more comfort.
  • Unique padding specifically designed for mountaineering, clinically shown to reduce blisters, pain, pressures and moisture for maximum protection.
  • Ventilation panel for extra moisture control and breathability.

Product Details:

  • Length: Over-Calf
  • Cushion: Maximum Cushion
  • Fiber Contents: 60% Worsted wool, 26% Exclusive THOR•LON® Acrylic, 11% Stretch nylon, 3% Elastic
  • Protection Level: 3 (Maximum)
  • 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

More Information

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Customer Reviews

Great Value
Review by John
Verified Buyer
Very well-made & warm. I expect them to last a few winters. They were a little snug, but I expected them to be that way since they are sized up to 12.5 and I wear 13D shoe / 14 boot. I may pick up a few more pair.
Outstanding value on these sox
Review by Mike
Verified Buyer
My foot runs on the small side (between an 8.5 and 9) no problem on fit. Easily worn over a sock liner and kept my feet warm and toasty on an all day winter trout fishing trip in knee deep snow.

100% Recommend for anyone looking for some warm socks at an outstanding value. Made in USA too!
Review by Glenn
Verified Buyer
Serious winter socks. Thick. Got them for Micky mouse boots
An excellent value
Review by RIC
Verified Buyer
Always on the lookout for a good pair of 4-season hiking socks, and these ones are a serious qualifier. Although they seemed to run a little too small (I wear a US 10.5 boot) to wear over an inner sock, their quality and durability can be felt immediately. Not too thick to be constricting under a trail boot yet remarkably soft and with perfect thermal insulation. I have not worn them enough to really assess their durability but at their price I feel completely satifsfied with the purchase.
Great socks!
Review by Al#1
Verified Buyer
Same socks I wore with my flight boots when I served. Nice cushion in the heel and toe and not too tight on the calf but they do not slide down either. Price is great, about a third or less than any place on the web. I will order a few more pair before they are gone. Thanks, KS for a great deal!

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