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  • Heavy cushioning on heel and toe offers maximum comfort and protection in high-impact areas; flat-knit foot and leg fit comfortably inside low-volume mountaineering boots
  • 4 Degree Elite Fit System improves comfort with two elastics around ankle and instep to provide greater stretch and recovery to keep the socks in place
  • Patented ReliaWool is a reinforcement construction that puts more wool in high-wear, high-impact areas to increase durability and comfort
  • Merino wool provides excellent temperature control and moisture management, so you're warm when it's cold and cool when it's warm
  • Strategically placed mesh zones provide ventilation for temperature and moisture management
  • Merino wool keeps your feet dry and inhospitable to bacteria that can cause odor
  • Smartwool socks are guaranteed not to itch and can be repeatedly machine-washed and dried without shrinking
  • Flat-knit toe seams reduce chafing and irritation for long-lasting comfort
  • Smartwool PhD Mountaineering Socks are 14 in. tall
  • *Discount will be applied when you check out. Offer not valid for sale-price items ending in $._3 or $._9

Made in USA.

View all Smartwool Men's Hiking Socks

REI membership


Best Use Mountaineering
Fabric 76% merino wool/22% nylon/2% spandex
Sock Height Knee-high
Sock Cushioning Heavy Cushioning
Gender Unisex
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