Octa is a revolutionary insulation featuring a unique multichannel fiber with a hollow core and eight protruding fins. This specialized geometry creates vast air pockets that trap body heat while significantly reducing the material's overall weight.

Norrøna utilizes Octa in our high-intensity alpine layers because it offers the perfect balance of warmth and airflow. Its multichannel structure facilitates capillary action, pulling sweat away from the skin and spreading it over a larger surface area for near-instant evaporation during strenuous ascents.