Mountain Hardwear

Kor Stasis Jacket - Men's

What Our Gearhead® Experts Are Saying:

"I use this for colder trail runs and skin tracks where a typical insulated jacket would get clammy fast. It breathes really well while still keeping the chill off, and the mapped underarm ventilation helps a lot once the pace picks up."

Cold-weather movement generates heat just as quickly as it demands warmth. Mountain Hardwear built the Kor Stasis Jacket for those high-output days when we’re moving fast on skin tracks, climbing approaches, or pushing through winter trail miles.

A Pertex Quantum Air ripstop shell blocks wind and light weather while allowing heat and vapor to escape during sustained effort. PrimaLoft Gold Active insulation stretches and breathes naturally, delivering warmth that adapts to movement instead of trapping sweat. Underarm panels use more air-permeable fabric with reduced insulation to increase ventilation exactly where heat builds fastest. The result is a lightweight layer that keeps us warm while staying comfortable during cold-weather efforts.