SmartWool Mountaineering Extra Heavy Crew Sock - Women's

Extra tough socks designed for the mountain top.

The superior cushioning of the SmartWool Women's Mountaineering Extra Heavy Crew Socks keeps your feet warm and dry when you're multi-day backpacking, ice climbing, or mountaineering. The merino wool construction ensures your feet stay cool, dry, and stink-free, while the arch brace holds your sock in place all-day.

  • 74% merino wool, 25% nylon, 1% elastane
  • Flat knit toe seam
  • Moisture-wicking
  • Heavy-cushioning
  • Crew height
  • Reviews
  • Q & A


  • Familiarity: I gave it as a gift but have feedback to share
  • Fit: True to size

I purchased these for my daughter in preparation for a planned multiday Winter hike. I've long been sold on smartwool socks so I knew they'd be good. I am impressed at their thickness and cushion. My daughter was too.

So warm!

  • Familiarity: I've put it through the wringer
  • Fit: True to size

These socks are perfect for a winter hike or snowshoeing. I love how thick and warm they are! They are still merino wool though, so they help to regulate your temperature and keep any moisture wicked too while hiking!
These are pretty thick, so your boots can feel pretty tight on, but they also make a great pair of house socks or cabin socks to keep your feet super warm while hanging out inside.
I even caught my husband wearing them to work the other day (electrician working outside in the snow lately!) and they said his feet have never felt more warm and comfortable while working!