USMC extreme cold/ mountaineering socks by Thorlo


SKU: ST-13 Category:


Defeat Winter’s Fury with these USMC extreme cold/ mountaineering socks by Thorlo


USMC extreme cold/ mountaineering socks by Thorlo are constructed of a wool blend yarn made to provide comfort, protection against blisters, low temperatures, and be quick drying. They were designed to be utilized by Marines primarily during cold weather operations and when used in conjunction with other components of the cold weather clothing system, will assist in providing comfort and warmth to the wearer.  The Cold Weather socks were designed to be utilized during cold weather operations or at the discretion of the Marine. The cold weather sock provides greater protection against cold weather than the sea bag “issued” boot socks.

USMC extreme cold/ mountaineering socks by Thorlo BENEFITS

  • 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 extra moisture control and breathability.


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

Because of the thickness of these socks, you may need to wear cold weather boots one-half size larger than you normally would. If possible, wear the socks when you’re being fitted for cold weather boots.

These are authentic USMC issue and are marked DSCP (Defense Supply Center Philadelphia).  We take three pairs when trekking in extreme conditions: two to rotate every other day and one to wear when sleeping.


Additional information

Shoe size

Large (US: 9-12.5), XL (US: 13-15)


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