Icebreaker's thinnest.

Go any thinner than the Icebreaker Women's Run Plus Ultra Light Anatomical Micro Sock and you'd be running barefoot. Made with merino wool, this sock offers ultralight thermal regulation, natural odor-resistance, and a soft, itch-free feel.

  • Merino wool blend
  • Naturally antimicrobial
  • Ventilation zones
  • Achilles instep support
  • Seamless toe closure
  • Reviews
  • Q & A

Not worth the cost

  • Familiarity: I returned this product before using it

Seemed too lightweight when I was after cushion. I ended up returning for a SmartWool pair that has more cushion.


  • Familiarity: I've used it several times

Definitely an "Ultra Light" sock. Seems like it's very durable though.

Tried and True

  • Familiarity: I've used it several times
  • Fit: True to size

Love this running sock - breathes well, doesn't bunch, lightweight.