Boasting 360 Degree Reflectivity for unparalleled safety, this impressive piece features 2XU 's outstanding 3D THERMAL on side panels. 3D THERMAL panels offer warmth, moisture management, thermo regulation, and a smooth finish against the skin. This transeasonal Run Jacket offers flexibility for comfort during activity plus EXTREME MESH panels on the back, resulting in a micro climate to meet the highest demands placed upon it. While exceptional for running, this jacket will find a home in all outdoor endurance sports including trail run/hike and nordic skiing.