The Transform JKT, as the name suggests, “transforms” the jacket by unzipping the front and stuffing the top part of the jacket into its pocket. The Gyakusou version of the jacket gives the lightweight woven outer that protects runners from wind and rain a distinct color and graphic treatment, while the soft Dri-Fit base is designed to wick sweat. A second jacket, the Lightweight JKT, employs skin temperature maps to ensure properly placed laser cut holes to maximize breathability.