Rapidly developed in a span of 90 days, Westcomb's Shift jacket is a lightweight, 11oz technical jacket made from Polartec Neoshell, in fact, its the lightest jacket in the world using that material. Westcomb didn't skimp on durability in the speedy development process, the jacket features twenty stitches per inch for increased durability and 2-ply seam tape to help save weight. Link / Source
Mission Workshop maximizes breathability for its lightweight Meridian : Phase Jacket
The company uses body heat mapping to create the perfect athletic jacket.