Smartwool  Mountaineering Extra Heavy Crew Socks

This product is not available.

Shop similar products

High-performance Smartwool Mountaineering Extra Heavy Crew socks are designed for maximum comfort, protection and warmth over extended periods.


  • Extra-thick 3 x 1 knit with mid-calf design provides extra protection and a snug fit
  • Natural merino wool features long, silky fibers for extra warmth and comfort without wool's itchiness
  • High-density sole padding cushions against shock, blisters and abrasions; high-density padded insteps and shins protects against lace pressure
  • Lycra® spandex arch braces for increased support and comfort
  • Rib-knit welt top and Lycra spandex braces above the ankle help keep socks up for a wrinkle-free fit and less chance of blisters
  • Flat-knit side panels add breathability and ventilation to keep feet comfortable

Made in USA.

View all Smartwool Men's Hiking Socks

Technical Specs

Item #618127
Best Use




74% merino wool/25% nylon/1% elastic

Sock Height


Sock Cushioning

Heavy Cushioning

Moisture Wicking




Size Chart

U.S. Men's3 - 5.56 - 8.59 - 11.512 - 14.5
U.S. Women's4 - 6.57 - 9.510 - 12.5
EU34 - 3738 - 4142 - 4546 - 49

Sizing Notes

For socks, please use shoe size.

312 reviews with an average rating of 4.7 out of 5 stars

Loading Reviews...

Questions & Answers

Loading Questions...