It's everyone's dream—go from freezing temps to working up a sweat, no change in layers required.

The Kor AirShell™ Warm Vest doesn't require shedding or adding layers thanks to a powerful combo: temperature-regulating AirMesh™ on the inside to keep you warm when it's cold and cool when it's warm, and breathable, stretchy Pertex® Quantum Air on the outside to release clammy sweat. All while fending off pesky branches—no problem—as you pick up speed on cross-country trails.