What Our Gearhead(R) Experts Are Saying:"This is my go-to wind layer for high-output activities. The Pertex(R) Quantum Air fabric is impressively breathable while still cutting the wind, and the stretch ensures unrestricted movement on the trail or the crag. It stuffs down into its own pocket, so I always have it clipped to my pack just in case."The Kor AirShell Hooded Jacket is an essential layer for fast-paced adventures in unpredictable conditions. Built with Pertex(R) Quantum Air ripstop fabric, this ultralight jacket balances wind resistance with breathability, keeping us comfortable when pushing our limits on exposed ridges and blustery trails. Elastic binding at the hood, cuffs, and hem keeps warmth in while ensuring a secure fit, while underarm gussets enhance mobility for climbing, hiking, or running. When the wind dies down, the highly packable design stuffs into its own pocket, making it easy to clip onto a harness or pack.