it´s the insulated jacket you can actually run in. That´s because the insulation adapts to your activity level, so as you heat up, it lets out warmth. adjusted: close to the body without being too sticky water resistant and breathable ua storm technologyintelligent coldgear reactor insulation that adapts to any activity for total versatility and comfort at all timesstretch fabric and lightweight quilted insulation help keep you warm without extra weightzippered back pocket for safe storage of your id or cardslonger cut and rounded hem for more protection in the backreflective logos main material: 100 % polyesterpanels: 87% polyester/13% elastaneimported product