Harnessing seam-sealed Futurelight breathable-waterproof fabric technology, the Active Trail Insulated Futurelight Jacket is your ally in a downpour. And thanks to Ventrix™ stretch synthetic insulation in the body, it's perfect for all cold-weather hikes. This works by keeping you warm when you set out and using perforations on the back to prevent you from overheating as your body works harder.