Icebreaker Mens Mountaineer Expedition Mid Calf Socks

Size Chart
Natural/Monsoon Heather

The Icebreaker Men's Mountaineer Mid Calf Expedition Cushion 101291 features full and dense cushioning to provide maximum warmth and comfort on your next cold-weather trek. With Achilles support, instep support, and a seamless toe closure, the 101291 provides a blister-free, non-slip fit. Double-up merino cushioning provides increased comfort and a reinforced heel and toe maximizes durability and strength, making the Men's Mountaineer Mid Calf your go-to expedition sock.

Icebreaker socks are made in the USA with imported premium wool. Icebreaker takes pride in the quality of their socks and backs them with a Lifetime Guarantee.


  • Mid Calf Height (12")
  • Thermal Regulation and Odor Resistant
  • Expedition Weight, Full and Dense Cushion
  • Double-up Cushioning in Heel and Metatarsal
  • Achilles Support
  • Reinforced Heel and Toe
  • Instep Support for Stability
  • Seamless Toe Closure
  • Breathe Zone for Improved Ventilation
  • Function Junction to Eliminate Bulk
  • Comfort Cuff Featuring a Wide Welt For Comfort


79% Merino Wool, 20% Nylon, 1% Lycra

Sock Height

Crew Height Sock

Sock Cushion

Heavy Cushion Sock