The all-new Summit Gilltek™ Jacket offers warmth when you want it and breathes when you need it in a one-and-done ligthweight insulator. From chilly days at your favorite resort to stop-and-go touring and cold-weather walks, there's no need to peel back layers with this versatile essential. Gilltek™ regulates internal temps by venting uncomfortable heat when you're working hard, and trapping it when you come to a halt. Articulated elbows maintain an ergonomic fit and a hidden bag lets you stash the jacket or even use it as a travel pillow.